diff --git a/.changeset/blue-dancers-dream.md b/.changeset/blue-dancers-dream.md
new file mode 100644
index 0000000000..7096002986
--- /dev/null
+++ b/.changeset/blue-dancers-dream.md
@@ -0,0 +1,5 @@
+---
+'@udecode/plate-selection': patch
+---
+
+Fix multi-block deletion, cmd+a while selecting, arrow up/down while selecting all
diff --git a/.changeset/funny-ducks-care.md b/.changeset/funny-ducks-care.md
new file mode 100644
index 0000000000..05a0ead9e7
--- /dev/null
+++ b/.changeset/funny-ducks-care.md
@@ -0,0 +1,5 @@
+---
+'@udecode/plate-code-block': patch
+---
+
+Support invalid languages
diff --git a/.changeset/honest-colts-fly.md b/.changeset/honest-colts-fly.md
new file mode 100644
index 0000000000..066afd2e49
--- /dev/null
+++ b/.changeset/honest-colts-fly.md
@@ -0,0 +1,5 @@
+---
+'@udecode/plate-core': patch
+---
+
+Better error message for editor.api.debug.error
diff --git a/apps/www/content/docs/en/components/changelog.mdx b/apps/www/content/docs/en/components/changelog.mdx
index 86bb53a0bc..734c3e6f76 100644
--- a/apps/www/content/docs/en/components/changelog.mdx
+++ b/apps/www/content/docs/en/components/changelog.mdx
@@ -23,7 +23,7 @@ Plate 46 - new code block
   - `code-syntax-leaf-static`, `code-syntax-leaf`: Updated to use lowlight token classes
   - Removed `prismjs` dependency and related styles
   - Use `lowlight` plugin option instead of `prism` option
-  - `code-block-combobox`: add `Auto` language option
+  - `code-block-combobox`: add `Auto` language option, change language values to match lowlight
 - `autoformat-plugin`: prevent autoformat on code blocks
 
 ```tsx
diff --git a/apps/www/public/r/styles/default/code-block-element.json b/apps/www/public/r/styles/default/code-block-element.json
index 2141400a1e..5cf48e8d7b 100644
--- a/apps/www/public/r/styles/default/code-block-element.json
+++ b/apps/www/public/r/styles/default/code-block-element.json
@@ -32,7 +32,7 @@
     },
     {
       "path": "plate-ui/code-block-combobox.tsx",
-      "content": "'use client';\n\nimport React, { useState } from 'react';\n\nimport type { TCodeBlockElement } from '@udecode/plate-code-block';\n\nimport { cn } from '@udecode/cn';\nimport { useEditorRef, useElement, useReadOnly } from '@udecode/plate/react';\nimport { Check } from 'lucide-react';\n\nimport { Button } from './button';\nimport {\n  Command,\n  CommandEmpty,\n  CommandGroup,\n  CommandInput,\n  CommandItem,\n  CommandList,\n} from './command';\nimport { Popover, PopoverContent, PopoverTrigger } from './popover';\n\nconst languages: { label: string; value: string }[] = [\n  { label: 'Auto', value: 'auto' },\n  { label: 'Plain Text', value: 'plaintext' },\n  { label: 'Bash', value: 'bash' },\n  { label: 'C', value: 'c' },\n  { label: 'C++', value: 'cpp' },\n  { label: 'C#', value: 'csharp' },\n  { label: 'CSS', value: 'css' },\n  { label: 'Diff', value: 'diff' },\n  { label: 'Go', value: 'go' },\n  { label: 'GraphQL', value: 'graphql' },\n  { label: 'HTML', value: 'html' },\n  { label: 'Java', value: 'java' },\n  { label: 'JavaScript', value: 'javascript' },\n  { label: 'JSON', value: 'json' },\n  { label: 'JSX', value: 'jsx' },\n  { label: 'Kotlin', value: 'kotlin' },\n  { label: 'Less', value: 'less' },\n  { label: 'Lua', value: 'lua' },\n  { label: 'Makefile', value: 'makefile' },\n  { label: 'Markdown', value: 'markdown' },\n  { label: 'Objective-C', value: 'objectivec' },\n  { label: 'PHP', value: 'php' },\n  { label: 'Python', value: 'python' },\n  { label: 'R', value: 'r' },\n  { label: 'Ruby', value: 'ruby' },\n  { label: 'Rust', value: 'rust' },\n  { label: 'SCSS', value: 'scss' },\n  { label: 'Shell', value: 'shell' },\n  { label: 'SQL', value: 'sql' },\n  { label: 'Swift', value: 'swift' },\n  { label: 'TypeScript', value: 'typescript' },\n  { label: 'TSX', value: 'tsx' },\n  { label: 'XML', value: 'xml' },\n  { label: 'YAML', value: 'yaml' },\n];\n\nexport function CodeBlockCombobox() {\n  const [open, setOpen] = useState(false);\n  const readOnly = useReadOnly();\n  const editor = useEditorRef();\n  const element = useElement<TCodeBlockElement>();\n  const value = element.lang ?? 'plaintext';\n  const [searchValue, setSearchValue] = React.useState('');\n\n  const items = React.useMemo(\n    () =>\n      languages.filter(\n        (language) =>\n          !searchValue ||\n          language.label.toLowerCase().includes(searchValue.toLowerCase())\n      ),\n    [searchValue]\n  );\n\n  if (readOnly) return null;\n\n  return (\n    <Popover open={open} onOpenChange={setOpen}>\n      <PopoverTrigger asChild>\n        <Button\n          size=\"xs\"\n          variant=\"ghost\"\n          className=\"h-6 justify-between text-muted-foreground gap-1 px-2 text-xs select-none\"\n          aria-expanded={open}\n          role=\"combobox\"\n        >\n          {languages.find((language) => language.value === value)?.label ??\n            'Plain Text'}\n        </Button>\n      </PopoverTrigger>\n      <PopoverContent\n        className=\"w-[200px] p-0\"\n        onCloseAutoFocus={() => setSearchValue('')}\n      >\n        <Command shouldFilter={false}>\n          <CommandInput\n            className=\"h-9\"\n            value={searchValue}\n            onValueChange={(value) => setSearchValue(value)}\n            placeholder=\"Search language...\"\n          />\n          <CommandEmpty>No language found.</CommandEmpty>\n\n          <CommandList className=\"h-[344px] overflow-y-auto\">\n            <CommandGroup>\n              {items.map((language) => (\n                <CommandItem\n                  key={language.value}\n                  className=\"cursor-pointer\"\n                  value={language.value}\n                  onSelect={(value) => {\n                    editor.tf.setNodes<TCodeBlockElement>(\n                      { lang: value },\n                      { at: element }\n                    );\n                    setSearchValue(value);\n                    setOpen(false);\n                  }}\n                >\n                  <Check\n                    className={cn(\n                      value === language.value ? 'opacity-100' : 'opacity-0'\n                    )}\n                  />\n                  {language.label}\n                </CommandItem>\n              ))}\n            </CommandGroup>\n          </CommandList>\n        </Command>\n      </PopoverContent>\n    </Popover>\n  );\n}\n",
+      "content": "'use client';\n\nimport React, { useState } from 'react';\n\nimport type { TCodeBlockElement } from '@udecode/plate-code-block';\n\nimport { cn } from '@udecode/cn';\nimport { useEditorRef, useElement, useReadOnly } from '@udecode/plate/react';\nimport { Check } from 'lucide-react';\n\nimport { Button } from './button';\nimport {\n  Command,\n  CommandEmpty,\n  CommandGroup,\n  CommandInput,\n  CommandItem,\n  CommandList,\n} from './command';\nimport { Popover, PopoverContent, PopoverTrigger } from './popover';\n\nconst languages: { label: string; value: string }[] = [\n  { label: 'Auto', value: 'auto' },\n  { label: 'Plain Text', value: 'plaintext' },\n  { label: 'ABAP', value: 'abap' },\n  { label: 'Agda', value: 'agda' },\n  { label: 'Arduino', value: 'arduino' },\n  { label: 'ASCII Art', value: 'ascii' },\n  { label: 'Assembly', value: 'x86asm' },\n  { label: 'Bash', value: 'bash' },\n  { label: 'BASIC', value: 'basic' },\n  { label: 'BNF', value: 'bnf' },\n  { label: 'C', value: 'c' },\n  { label: 'C#', value: 'csharp' },\n  { label: 'C++', value: 'cpp' },\n  { label: 'Clojure', value: 'clojure' },\n  { label: 'CoffeeScript', value: 'coffeescript' },\n  { label: 'Coq', value: 'coq' },\n  { label: 'CSS', value: 'css' },\n  { label: 'Dart', value: 'dart' },\n  { label: 'Dhall', value: 'dhall' },\n  { label: 'Diff', value: 'diff' },\n  { label: 'Docker', value: 'dockerfile' },\n  { label: 'EBNF', value: 'ebnf' },\n  { label: 'Elixir', value: 'elixir' },\n  { label: 'Elm', value: 'elm' },\n  { label: 'Erlang', value: 'erlang' },\n  { label: 'F#', value: 'fsharp' },\n  { label: 'Flow', value: 'flow' },\n  { label: 'Fortran', value: 'fortran' },\n  { label: 'Gherkin', value: 'gherkin' },\n  { label: 'GLSL', value: 'glsl' },\n  { label: 'Go', value: 'go' },\n  { label: 'GraphQL', value: 'graphql' },\n  { label: 'Groovy', value: 'groovy' },\n  { label: 'Haskell', value: 'haskell' },\n  { label: 'HCL', value: 'hcl' },\n  { label: 'HTML', value: 'html' },\n  { label: 'Idris', value: 'idris' },\n  { label: 'Java', value: 'java' },\n  { label: 'JavaScript', value: 'javascript' },\n  { label: 'JSON', value: 'json' },\n  { label: 'Julia', value: 'julia' },\n  { label: 'Kotlin', value: 'kotlin' },\n  { label: 'LaTeX', value: 'latex' },\n  { label: 'Less', value: 'less' },\n  { label: 'Lisp', value: 'lisp' },\n  { label: 'LiveScript', value: 'livescript' },\n  { label: 'LLVM IR', value: 'llvm' },\n  { label: 'Lua', value: 'lua' },\n  { label: 'Makefile', value: 'makefile' },\n  { label: 'Markdown', value: 'markdown' },\n  { label: 'Markup', value: 'markup' },\n  { label: 'MATLAB', value: 'matlab' },\n  { label: 'Mathematica', value: 'mathematica' },\n  { label: 'Mermaid', value: 'mermaid' },\n  { label: 'Nix', value: 'nix' },\n  { label: 'Notion Formula', value: 'notion' },\n  { label: 'Objective-C', value: 'objectivec' },\n  { label: 'OCaml', value: 'ocaml' },\n  { label: 'Pascal', value: 'pascal' },\n  { label: 'Perl', value: 'perl' },\n  { label: 'PHP', value: 'php' },\n  { label: 'PowerShell', value: 'powershell' },\n  { label: 'Prolog', value: 'prolog' },\n  { label: 'Protocol Buffers', value: 'protobuf' },\n  { label: 'PureScript', value: 'purescript' },\n  { label: 'Python', value: 'python' },\n  { label: 'R', value: 'r' },\n  { label: 'Racket', value: 'racket' },\n  { label: 'Reason', value: 'reasonml' },\n  { label: 'Ruby', value: 'ruby' },\n  { label: 'Rust', value: 'rust' },\n  { label: 'Sass', value: 'scss' },\n  { label: 'Scala', value: 'scala' },\n  { label: 'Scheme', value: 'scheme' },\n  { label: 'SCSS', value: 'scss' },\n  { label: 'Shell', value: 'shell' },\n  { label: 'Smalltalk', value: 'smalltalk' },\n  { label: 'Solidity', value: 'solidity' },\n  { label: 'SQL', value: 'sql' },\n  { label: 'Swift', value: 'swift' },\n  { label: 'TOML', value: 'toml' },\n  { label: 'TypeScript', value: 'typescript' },\n  { label: 'VB.Net', value: 'vbnet' },\n  { label: 'Verilog', value: 'verilog' },\n  { label: 'VHDL', value: 'vhdl' },\n  { label: 'Visual Basic', value: 'vbnet' },\n  { label: 'WebAssembly', value: 'wasm' },\n  { label: 'XML', value: 'xml' },\n  { label: 'YAML', value: 'yaml' },\n];\n\nexport function CodeBlockCombobox() {\n  const [open, setOpen] = useState(false);\n  const readOnly = useReadOnly();\n  const editor = useEditorRef();\n  const element = useElement<TCodeBlockElement>();\n  const value = element.lang || 'plaintext';\n  const [searchValue, setSearchValue] = React.useState('');\n\n  const items = React.useMemo(\n    () =>\n      languages.filter(\n        (language) =>\n          !searchValue ||\n          language.label.toLowerCase().includes(searchValue.toLowerCase())\n      ),\n    [searchValue]\n  );\n\n  if (readOnly) return null;\n\n  return (\n    <Popover open={open} onOpenChange={setOpen}>\n      <PopoverTrigger asChild>\n        <Button\n          size=\"xs\"\n          variant=\"ghost\"\n          className=\"h-6 justify-between gap-1 px-2 text-xs text-muted-foreground select-none\"\n          aria-expanded={open}\n          role=\"combobox\"\n        >\n          {languages.find((language) => language.value === value)?.label ??\n            'Plain Text'}\n        </Button>\n      </PopoverTrigger>\n      <PopoverContent\n        className=\"w-[200px] p-0\"\n        onCloseAutoFocus={() => setSearchValue('')}\n      >\n        <Command shouldFilter={false}>\n          <CommandInput\n            className=\"h-9\"\n            value={searchValue}\n            onValueChange={(value) => setSearchValue(value)}\n            placeholder=\"Search language...\"\n          />\n          <CommandEmpty>No language found.</CommandEmpty>\n\n          <CommandList className=\"h-[344px] overflow-y-auto\">\n            <CommandGroup>\n              {items.map((language) => (\n                <CommandItem\n                  key={language.label}\n                  className=\"cursor-pointer\"\n                  value={language.value}\n                  onSelect={(value) => {\n                    editor.tf.setNodes<TCodeBlockElement>(\n                      { lang: value },\n                      { at: element }\n                    );\n                    setSearchValue(value);\n                    setOpen(false);\n                  }}\n                >\n                  <Check\n                    className={cn(\n                      value === language.value ? 'opacity-100' : 'opacity-0'\n                    )}\n                  />\n                  {language.label}\n                </CommandItem>\n              ))}\n            </CommandGroup>\n          </CommandList>\n        </Command>\n      </PopoverContent>\n    </Popover>\n  );\n}\n",
       "type": "registry:ui",
       "target": "components/plate-ui/code-block-combobox.tsx"
     }
diff --git a/apps/www/src/registry/default/plate-ui/code-block-combobox.tsx b/apps/www/src/registry/default/plate-ui/code-block-combobox.tsx
index b45551ead4..11c171cbac 100644
--- a/apps/www/src/registry/default/plate-ui/code-block-combobox.tsx
+++ b/apps/www/src/registry/default/plate-ui/code-block-combobox.tsx
@@ -22,36 +22,91 @@ import { Popover, PopoverContent, PopoverTrigger } from './popover';
 const languages: { label: string; value: string }[] = [
   { label: 'Auto', value: 'auto' },
   { label: 'Plain Text', value: 'plaintext' },
+  { label: 'ABAP', value: 'abap' },
+  { label: 'Agda', value: 'agda' },
+  { label: 'Arduino', value: 'arduino' },
+  { label: 'ASCII Art', value: 'ascii' },
+  { label: 'Assembly', value: 'x86asm' },
   { label: 'Bash', value: 'bash' },
+  { label: 'BASIC', value: 'basic' },
+  { label: 'BNF', value: 'bnf' },
   { label: 'C', value: 'c' },
-  { label: 'C++', value: 'cpp' },
   { label: 'C#', value: 'csharp' },
+  { label: 'C++', value: 'cpp' },
+  { label: 'Clojure', value: 'clojure' },
+  { label: 'CoffeeScript', value: 'coffeescript' },
+  { label: 'Coq', value: 'coq' },
   { label: 'CSS', value: 'css' },
+  { label: 'Dart', value: 'dart' },
+  { label: 'Dhall', value: 'dhall' },
   { label: 'Diff', value: 'diff' },
+  { label: 'Docker', value: 'dockerfile' },
+  { label: 'EBNF', value: 'ebnf' },
+  { label: 'Elixir', value: 'elixir' },
+  { label: 'Elm', value: 'elm' },
+  { label: 'Erlang', value: 'erlang' },
+  { label: 'F#', value: 'fsharp' },
+  { label: 'Flow', value: 'flow' },
+  { label: 'Fortran', value: 'fortran' },
+  { label: 'Gherkin', value: 'gherkin' },
+  { label: 'GLSL', value: 'glsl' },
   { label: 'Go', value: 'go' },
   { label: 'GraphQL', value: 'graphql' },
+  { label: 'Groovy', value: 'groovy' },
+  { label: 'Haskell', value: 'haskell' },
+  { label: 'HCL', value: 'hcl' },
   { label: 'HTML', value: 'html' },
+  { label: 'Idris', value: 'idris' },
   { label: 'Java', value: 'java' },
   { label: 'JavaScript', value: 'javascript' },
   { label: 'JSON', value: 'json' },
-  { label: 'JSX', value: 'jsx' },
+  { label: 'Julia', value: 'julia' },
   { label: 'Kotlin', value: 'kotlin' },
+  { label: 'LaTeX', value: 'latex' },
   { label: 'Less', value: 'less' },
+  { label: 'Lisp', value: 'lisp' },
+  { label: 'LiveScript', value: 'livescript' },
+  { label: 'LLVM IR', value: 'llvm' },
   { label: 'Lua', value: 'lua' },
   { label: 'Makefile', value: 'makefile' },
   { label: 'Markdown', value: 'markdown' },
+  { label: 'Markup', value: 'markup' },
+  { label: 'MATLAB', value: 'matlab' },
+  { label: 'Mathematica', value: 'mathematica' },
+  { label: 'Mermaid', value: 'mermaid' },
+  { label: 'Nix', value: 'nix' },
+  { label: 'Notion Formula', value: 'notion' },
   { label: 'Objective-C', value: 'objectivec' },
+  { label: 'OCaml', value: 'ocaml' },
+  { label: 'Pascal', value: 'pascal' },
+  { label: 'Perl', value: 'perl' },
   { label: 'PHP', value: 'php' },
+  { label: 'PowerShell', value: 'powershell' },
+  { label: 'Prolog', value: 'prolog' },
+  { label: 'Protocol Buffers', value: 'protobuf' },
+  { label: 'PureScript', value: 'purescript' },
   { label: 'Python', value: 'python' },
   { label: 'R', value: 'r' },
+  { label: 'Racket', value: 'racket' },
+  { label: 'Reason', value: 'reasonml' },
   { label: 'Ruby', value: 'ruby' },
   { label: 'Rust', value: 'rust' },
+  { label: 'Sass', value: 'scss' },
+  { label: 'Scala', value: 'scala' },
+  { label: 'Scheme', value: 'scheme' },
   { label: 'SCSS', value: 'scss' },
   { label: 'Shell', value: 'shell' },
+  { label: 'Smalltalk', value: 'smalltalk' },
+  { label: 'Solidity', value: 'solidity' },
   { label: 'SQL', value: 'sql' },
   { label: 'Swift', value: 'swift' },
+  { label: 'TOML', value: 'toml' },
   { label: 'TypeScript', value: 'typescript' },
-  { label: 'TSX', value: 'tsx' },
+  { label: 'VB.Net', value: 'vbnet' },
+  { label: 'Verilog', value: 'verilog' },
+  { label: 'VHDL', value: 'vhdl' },
+  { label: 'Visual Basic', value: 'vbnet' },
+  { label: 'WebAssembly', value: 'wasm' },
   { label: 'XML', value: 'xml' },
   { label: 'YAML', value: 'yaml' },
 ];
@@ -61,7 +116,7 @@ export function CodeBlockCombobox() {
   const readOnly = useReadOnly();
   const editor = useEditorRef();
   const element = useElement<TCodeBlockElement>();
-  const value = element.lang ?? 'plaintext';
+  const value = element.lang || 'plaintext';
   const [searchValue, setSearchValue] = React.useState('');
 
   const items = React.useMemo(
@@ -82,7 +137,7 @@ export function CodeBlockCombobox() {
         <Button
           size="xs"
           variant="ghost"
-          className="h-6 justify-between text-muted-foreground gap-1 px-2 text-xs select-none"
+          className="h-6 justify-between gap-1 px-2 text-xs text-muted-foreground select-none"
           aria-expanded={open}
           role="combobox"
         >
@@ -107,7 +162,7 @@ export function CodeBlockCombobox() {
             <CommandGroup>
               {items.map((language) => (
                 <CommandItem
-                  key={language.value}
+                  key={language.label}
                   className="cursor-pointer"
                   value={language.value}
                   onSelect={(value) => {
diff --git a/packages/code-block/src/lib/setCodeBlockToDecorations.spec.ts b/packages/code-block/src/lib/setCodeBlockToDecorations.spec.ts
index b032e14567..b885ad72f8 100644
--- a/packages/code-block/src/lib/setCodeBlockToDecorations.spec.ts
+++ b/packages/code-block/src/lib/setCodeBlockToDecorations.spec.ts
@@ -183,37 +183,6 @@ describe('codeBlockToDecorations', () => {
     expect(mockHighlightAuto).not.toHaveBeenCalled();
   });
 
-  it('should handle errors during highlighting', () => {
-    // Mock highlight to throw an error
-    mockHighlight.mockImplementation(() => {
-      throw new Error('Highlighting error');
-    });
-
-    // Create a code block
-    const codeBlock: TCodeBlockElement = {
-      children: [{ children: [{ text: 'const x = 1;' }], type: 'code_line' }],
-      lang: 'javascript',
-      type: 'code_block',
-    };
-
-    const blockPath = [0];
-    const result = codeBlockToDecorations(editor, [codeBlock, blockPath]);
-
-    // Should have one entry for the code line
-    expect(result.size).toBe(1);
-
-    // The decorations for the line should be empty
-    const lineDecorations = result.get(codeBlock.children[0] as any);
-    expect(lineDecorations).toEqual([]);
-
-    // Error should be logged
-    expect(editor.api.debug.error).toHaveBeenCalledWith(
-      'Highlighting error:',
-      'CODE_HIGHLIGHT',
-      expect.any(Error)
-    );
-  });
-
   it('should handle multiline code blocks', () => {
     // Mock highlight result for multiline code
     mockHighlight.mockReturnValue({
diff --git a/packages/code-block/src/lib/setCodeBlockToDecorations.ts b/packages/code-block/src/lib/setCodeBlockToDecorations.ts
index 260887f805..5d3d661aa0 100644
--- a/packages/code-block/src/lib/setCodeBlockToDecorations.ts
+++ b/packages/code-block/src/lib/setCodeBlockToDecorations.ts
@@ -72,28 +72,39 @@ export function codeBlockToDecorations(
   editor: SlateEditor,
   [block, blockPath]: NodeEntry<TCodeBlockElement>
 ) {
-  const { defaultLanguage, lowlight } = editor.getOptions(BaseCodeBlockPlugin);
+  const { defaultLanguage, ...options } =
+    editor.getOptions(BaseCodeBlockPlugin);
+  const lowlight = options.lowlight!;
 
   // Get all code lines and combine their text
   const text = block.children.map((line) => NodeApi.string(line)).join('\n');
   const language = block.lang;
+  const effectiveLanguage = language || defaultLanguage;
 
-  // Highlight the code
   let highlighted;
   try {
-    const effectiveLanguage = language || defaultLanguage;
-
     // Skip highlighting for plaintext or when no language is specified
     if (!effectiveLanguage || effectiveLanguage === 'plaintext') {
       highlighted = { value: [] }; // Empty result for plaintext
     } else if (effectiveLanguage === 'auto') {
-      highlighted = lowlight!.highlightAuto(text);
+      highlighted = lowlight.highlightAuto(text);
     } else {
-      highlighted = lowlight!.highlight(effectiveLanguage, text);
+      highlighted = lowlight.highlight(effectiveLanguage, text);
     }
   } catch (error) {
-    editor.api.debug.error('Highlighting error:', 'CODE_HIGHLIGHT', error);
-    highlighted = { value: [] }; // Empty result on error
+    // Verify if language is registered, fallback to plaintext if not
+    const availableLanguages = lowlight.listLanguages();
+    const isLanguageRegistered =
+      effectiveLanguage && availableLanguages.includes(effectiveLanguage);
+    if (isLanguageRegistered) {
+      editor.api.debug.error(error, 'CODE_HIGHLIGHT');
+      highlighted = { value: [] }; // Empty result on error
+    } else {
+      editor.api.debug.warn(
+        `Language "${effectiveLanguage}" is not registered. Falling back to plaintext`
+      );
+      highlighted = { value: [] };
+    }
   }
 
   // Parse and normalize tokens
@@ -104,8 +115,11 @@ export function codeBlockToDecorations(
   // Create decorations map
   const nodeToDecorations = new Map<TElement, DecoratedRange[]>();
 
+  // Safety check: don't process more lines than we have children
+  const numLines = Math.min(normalizedTokens.length, blockChildren.length);
+
   // Process each line's tokens
-  for (let index = 0; index < normalizedTokens.length; index++) {
+  for (let index = 0; index < numLines; index++) {
     const lineTokens = normalizedTokens[index];
     const element = blockChildren[index];
 
diff --git a/packages/core/src/lib/plugins/debug/DebugPlugin.ts b/packages/core/src/lib/plugins/debug/DebugPlugin.ts
index c7c9597462..cbcf873175 100644
--- a/packages/core/src/lib/plugins/debug/DebugPlugin.ts
+++ b/packages/core/src/lib/plugins/debug/DebugPlugin.ts
@@ -58,10 +58,7 @@ export const DebugPlugin = createTSlatePlugin<DebugConfig>({
     if (options.isProduction && level === 'log') return;
     if (logLevels.indexOf(level) <= logLevels.indexOf(options.logLevel!)) {
       if (level === 'error' && options.throwErrors) {
-        const error =
-          message instanceof Error ? message : new PlateError(message, type);
-
-        throw error;
+        throw new PlateError(message, type);
       } else {
         options.logger[level]?.(message, type, details);
       }
diff --git a/packages/selection/src/react/BlockSelectionPlugin.tsx b/packages/selection/src/react/BlockSelectionPlugin.tsx
index 6e39fa6ae4..4fa7b0ceec 100644
--- a/packages/selection/src/react/BlockSelectionPlugin.tsx
+++ b/packages/selection/src/react/BlockSelectionPlugin.tsx
@@ -72,7 +72,7 @@ export type BlockSelectionConfig = PluginConfig<
       /** Focus block selection – that differs from the editor focus */
       focus: () => void;
       /** Get selected blocks */
-      getNodes: () => NodeEntry[];
+      getNodes: () => NodeEntry<TElement & { id: string }>[];
       /** Check if a block is selected. */
       has: (id: string[] | string) => boolean;
       /** Check if a block is selectable. */
@@ -203,7 +203,7 @@ export const BlockSelectionPlugin = createTPlatePlugin<BlockSelectionConfig>({
       getNodes: () => {
         const selectedIds = getOption('selectedIds');
 
-        return editor.api.blocks<TElement>({
+        return editor.api.blocks<TElement & { id: string }>({
           at: [],
           match: (n) => !!n.id && selectedIds?.has(n.id as string),
         });
diff --git a/packages/selection/src/react/components/BlockSelectionAfterEditable.tsx b/packages/selection/src/react/components/BlockSelectionAfterEditable.tsx
index d7fb5b7927..289ad41b83 100644
--- a/packages/selection/src/react/components/BlockSelectionAfterEditable.tsx
+++ b/packages/selection/src/react/components/BlockSelectionAfterEditable.tsx
@@ -93,6 +93,12 @@ export const BlockSelectionAfterEditable: EditableSiblingComponent = () => {
 
         return;
       }
+      if (isHotkey('mod+a')(e)) {
+        api.blockSelection.selectAll();
+
+        return;
+      }
+
       if (isHotkey('mod+shift+z')(e)) {
         editor.redo();
         selectInsertedBlocks(editor);
@@ -121,16 +127,22 @@ export const BlockSelectionAfterEditable: EditableSiblingComponent = () => {
       if (isHotkey(['backspace', 'delete'])(e) && !isReadonly) {
         e.preventDefault();
         editor.tf.withoutNormalizing(() => {
-          const entry = editor.api.block({
-            at: [],
-            match: (n) => !!n.id && selectedIds?.has(n.id as string),
-          });
+          const entries = [
+            ...editor.api.nodes({
+              at: [],
+              match: (n) => !!n.id && selectedIds?.has(n.id as string),
+            }),
+          ];
 
-          if (entry) {
+          for (const [, path] of [...entries].reverse()) {
             editor.tf.removeNodes({
-              at: entry[1],
+              at: path,
             });
+          }
+
+          const entry = entries[0];
 
+          if (entry) {
             if (editor.children.length === 0) {
               editor.tf.focus();
             } else {
diff --git a/packages/selection/src/react/internal/api/moveSelection.spec.tsx b/packages/selection/src/react/internal/api/moveSelection.spec.tsx
index 5ff6f8310a..eb4d65db55 100644
--- a/packages/selection/src/react/internal/api/moveSelection.spec.tsx
+++ b/packages/selection/src/react/internal/api/moveSelection.spec.tsx
@@ -96,7 +96,7 @@ describe('moveSelection', () => {
   });
 
   describe('when only one block is selected', () => {
-    it('should do nothing if there is no block above/below', () => {
+    it('should maintain current selection if there is no block above/below', () => {
       // Only block1 selected, anchor = block1
       editor.setOption(
         BlockSelectionPlugin,
@@ -105,21 +105,63 @@ describe('moveSelection', () => {
       );
       editor.setOption(BlockSelectionPlugin, 'anchorId', 'block1');
 
-      // Move up => block1 is the top-most => no block above
+      // Move up => block1 is the top-most => no block above => maintain block1
       moveSelection(editor, 'up');
 
-      const selectedIds = editor.getOption(BlockSelectionPlugin, 'selectedIds');
+      let selectedIds = editor.getOption(BlockSelectionPlugin, 'selectedIds');
       expect(Array.from(selectedIds!)).toEqual(['block1']);
+      let anchorId = editor.getOption(BlockSelectionPlugin, 'anchorId');
+      expect(anchorId).toBe('block1');
+
+      // Only block3 selected, anchor = block3
+      editor.setOption(
+        BlockSelectionPlugin,
+        'selectedIds',
+        new Set(['block3'])
+      );
+      editor.setOption(BlockSelectionPlugin, 'anchorId', 'block3');
+
+      // Move down => block3 is the bottom-most => no block below => maintain block3
+      moveSelection(editor, 'down');
+
+      selectedIds = editor.getOption(BlockSelectionPlugin, 'selectedIds');
+      expect(Array.from(selectedIds!)).toEqual(['block3']);
+      anchorId = editor.getOption(BlockSelectionPlugin, 'anchorId');
+      expect(anchorId).toBe('block3');
+    });
+
+    it('should maintain current selection when multiple blocks are selected and no prev/next block exists', () => {
+      // block1 and block2 selected at the top
+      editor.setOption(
+        BlockSelectionPlugin,
+        'selectedIds',
+        new Set(['block1', 'block2'])
+      );
+      editor.setOption(BlockSelectionPlugin, 'anchorId', 'block1');
 
-      // Move down twice => block2 => block3
-      moveSelection(editor, 'down'); // Now block3
-      moveSelection(editor, 'down'); // No block below block3 => do nothing
+      // Move up => no block above block1 => maintain current selection
+      moveSelection(editor, 'up');
 
-      const selectedIds2 = editor.getOption(
+      let selectedIds = editor.getOption(BlockSelectionPlugin, 'selectedIds');
+      expect(Array.from(selectedIds!)).toEqual(['block1']);
+      let anchorId = editor.getOption(BlockSelectionPlugin, 'anchorId');
+      expect(anchorId).toBe('block1');
+
+      // block2 and block3 selected at the bottom
+      editor.setOption(
         BlockSelectionPlugin,
-        'selectedIds'
+        'selectedIds',
+        new Set(['block2', 'block3'])
       );
-      expect(Array.from(selectedIds2!)).toEqual(['block3']);
+      editor.setOption(BlockSelectionPlugin, 'anchorId', 'block3');
+
+      // Move down => no block below block3 => maintain current selection
+      moveSelection(editor, 'down');
+
+      selectedIds = editor.getOption(BlockSelectionPlugin, 'selectedIds');
+      expect(Array.from(selectedIds!)).toEqual(['block3']);
+      anchorId = editor.getOption(BlockSelectionPlugin, 'anchorId');
+      expect(anchorId).toBe('block3');
     });
   });
 
diff --git a/packages/selection/src/react/internal/api/moveSelection.ts b/packages/selection/src/react/internal/api/moveSelection.ts
index bef423ba3c..b7943989d4 100644
--- a/packages/selection/src/react/internal/api/moveSelection.ts
+++ b/packages/selection/src/react/internal/api/moveSelection.ts
@@ -25,6 +25,8 @@ export const moveSelection = (
       const [prevNode] = prevEntry;
       setOption('anchorId', prevNode.id);
       api.blockSelection.set(prevNode.id);
+    } else {
+      api.blockSelection.set(blocks[0][0].id);
     }
   } else {
     // direction === 'down'
@@ -40,6 +42,8 @@ export const moveSelection = (
       const [nextNode] = nextEntry;
       setOption('anchorId', nextNode.id);
       api.blockSelection.set(nextNode.id);
+    } else {
+      api.blockSelection.set(blocks.at(-1)![0].id);
     }
   }
 };