diff --git a/src/js/src/app.ts b/src/js/src/app.ts
index b7e709d..dd6dbe0 100644
--- a/src/js/src/app.ts
+++ b/src/js/src/app.ts
@@ -1,12 +1,14 @@
 import { initTrackerAction } from "./lib/action/tracker-action";
 import { KimaiApi } from "./lib/api/kimai-api";
 import { AppEvent, StateKey } from "./lib/constants";
+import { registerGlobalErrorReporter } from "./lib/error-reporter";
 import { Store } from "./lib/store/store";
-import { AppState, GlobalSettings } from "./lib/types";
+import { AppState, GlobalSettings, SDConnectionInfo } from "./lib/types";
 
 const store = new Store<AppState>();
 
-$SD.onConnected(() => {
+$SD.onConnected((args: SDConnectionInfo) => {
+  registerGlobalErrorReporter(args);
   $SD.getGlobalSettings();
   $SD.onDidReceiveGlobalSettings(
     (event: { payload: { settings: GlobalSettings } }) => {
@@ -23,6 +25,9 @@ $SD.onConnected(() => {
       }
     }
   );
+  // setTimeout(() => {
+  //   throw new Error("test error " + new Date().toISOString());
+  // }, 1000);
 });
 
 EventEmitter.on(AppEvent.actionSuccess, (context: string) =>
diff --git a/src/js/src/lib/api/api.ts b/src/js/src/lib/api/api.ts
index 5a89e34..18893d6 100644
--- a/src/js/src/lib/api/api.ts
+++ b/src/js/src/lib/api/api.ts
@@ -13,10 +13,8 @@ export type ApiResponse<T> =
 
 export type TrackingItem = {
   id: string | number;
-};
-
-export type TimeEntry = {
   duration: number;
+  begin: string;
 };
 
 export type Category = {
diff --git a/src/js/src/lib/api/kimai-api-tracker-connector.ts b/src/js/src/lib/api/kimai-api-tracker-connector.ts
index 0764a30..3778c36 100644
--- a/src/js/src/lib/api/kimai-api-tracker-connector.ts
+++ b/src/js/src/lib/api/kimai-api-tracker-connector.ts
@@ -1,9 +1,10 @@
+import { parse } from "date-fns";
 import { AppEvent, StateKey } from "../constants";
 import { Store } from "../store/store";
 import { Tracker, TrackerEvent } from "../tracker";
 import { AppState, KimaiBackendProviderPluginConfig } from "../types";
 import { ApiTrackerConnector } from "./api";
-import { KimaiApi } from "./kimai-api";
+import { KimaiApi, kimaiDateFormatTz } from "./kimai-api";
 
 export class KimaiApiTrackerConnector implements ApiTrackerConnector {
   #api: KimaiApi;
@@ -13,6 +14,7 @@ export class KimaiApiTrackerConnector implements ApiTrackerConnector {
     onStart: this.onStart.bind(this),
     onStop: this.onStop.bind(this),
     onRequestWorkedToday: this.onRequestWorkedToday.bind(this),
+    onCheckIfCurrentlyActive: this.onCheckIfCurrentlyActive.bind(this),
   };
 
   backendProvider = "kimai" as const;
@@ -70,6 +72,30 @@ export class KimaiApiTrackerConnector implements ApiTrackerConnector {
     }
   }
 
+  async onCheckIfCurrentlyActive() {
+    console.log(
+      "KimaiApiTrackerConnector.onCheckIfCurrentlyActive()",
+      this.settings(this.#tracker)
+    );
+    const projectId = this.settings(this.#tracker)?.projectId;
+    const activityId = this.settings(this.#tracker)?.activityId;
+    if (this.#tracker.running) {
+      throw new Error(
+        "Tracker has already been started in Stream Deck. Check if there's an active event in the backend is too late."
+      );
+    }
+    if (projectId && activityId) {
+      const event = await this.#api.getCurrentlyActive(projectId, activityId);
+      if (event) {
+        this.#store.patchState({
+          [StateKey.currentEvent]: event,
+        });
+        const startTime = parse(event.begin, kimaiDateFormatTz, new Date());
+        this.#tracker.start(startTime);
+      }
+    }
+  }
+
   connect(tracker: Tracker) {
     this.#tracker = tracker;
 
@@ -79,6 +105,10 @@ export class KimaiApiTrackerConnector implements ApiTrackerConnector {
       TrackerEvent.requestWorkedToday,
       this.#bound.onRequestWorkedToday
     );
+    tracker.addEventListener(
+      TrackerEvent.checkIfCurrentlyActive,
+      this.#bound.onCheckIfCurrentlyActive
+    );
 
     return this;
   }
diff --git a/src/js/src/lib/api/kimai-api.ts b/src/js/src/lib/api/kimai-api.ts
index 1530b43..092b6b8 100644
--- a/src/js/src/lib/api/kimai-api.ts
+++ b/src/js/src/lib/api/kimai-api.ts
@@ -1,11 +1,5 @@
 import { format, startOfToday } from "date-fns";
-import {
-  ApiResponse,
-  Category,
-  TimeEntry,
-  TrackingItem,
-  tryFetch,
-} from "./api";
+import { ApiResponse, Category, TrackingItem, tryFetch } from "./api";
 import { KimaiBackendProviderPluginConfig } from "../types";
 
 type ApiConfig = {
@@ -14,6 +8,9 @@ type ApiConfig = {
   token: string;
 };
 
+export const kimaiDateFormat = "yyyy-MM-dd'T'HH:mm:ss";
+export const kimaiDateFormatTz = "yyyy-MM-dd'T'HH:mm:ssxx";
+
 export class KimaiApi {
   static instance: KimaiApi | null = null;
 
@@ -87,7 +84,7 @@ export class KimaiApi {
     this.assertValidConfig();
     const url = `${this.#baseUrl}api/timesheets`;
     const body = {
-      begin: format(new Date(), "yyyy-MM-dd'T'HH:mm:ss"),
+      begin: format(new Date(), kimaiDateFormat),
       project: projectId,
       activity: activityId,
       description: "",
@@ -110,6 +107,19 @@ export class KimaiApi {
     return tryFetch<any>(url, options);
   }
 
+  async getCurrentlyActive(projectId: number, activityId: number) {
+    this.assertValidConfig();
+    const params = new URLSearchParams({
+      active: "1",
+      project: String(projectId),
+      activity: String(activityId),
+    });
+    const url = `${this.#baseUrl}api/timesheets?${params.toString()}`;
+    const response = await tryFetch<TrackingItem[]>(url, this.fetchOptions);
+    if (!response.success) return null;
+    return response.body.length ? response.body[0] : null;
+  }
+
   async getProjects() {
     this.assertValidConfig();
     const url = `${this.#baseUrl}api/projects`;
@@ -128,7 +138,7 @@ export class KimaiApi {
   async listTodaysTimeEntries(
     projectId: number,
     activityId: number
-  ): Promise<ApiResponse<TimeEntry[]>> {
+  ): Promise<ApiResponse<TrackingItem[]>> {
     this.assertValidConfig();
     if (!projectId || !activityId) {
       return {
@@ -139,11 +149,11 @@ export class KimaiApi {
       };
     }
     const params = new URLSearchParams({
-      begin: format(startOfToday(), "yyyy-MM-dd'T'HH:mm:ss"),
+      begin: format(startOfToday(), kimaiDateFormat),
       "projects[]": String(projectId),
       "activities[]": String(activityId),
     });
     const url = `${this.#baseUrl}api/timesheets?${params.toString()}`;
-    return tryFetch<TimeEntry[]>(url, this.fetchOptions);
+    return tryFetch<TrackingItem[]>(url, this.fetchOptions);
   }
 }
diff --git a/src/js/src/lib/error-reporter.ts b/src/js/src/lib/error-reporter.ts
new file mode 100644
index 0000000..63550d5
--- /dev/null
+++ b/src/js/src/lib/error-reporter.ts
@@ -0,0 +1,9 @@
+import { SDConnectionInfo } from "./types";
+
+export function registerGlobalErrorReporter(info: SDConnectionInfo) {
+  window.addEventListener("error", ({ error }: ErrorEvent) => {
+    const message = `Error in ${info?.appInfo?.plugin?.uuid} (${info?.appInfo?.plugin?.version}): ${error?.message}\n${error?.stack}`;
+    console.log("Writing error log:", message);
+    $SD.logMessage(message);
+  });
+}
diff --git a/src/js/src/lib/tracker.ts b/src/js/src/lib/tracker.ts
index 623b94e..d342017 100644
--- a/src/js/src/lib/tracker.ts
+++ b/src/js/src/lib/tracker.ts
@@ -5,6 +5,7 @@ export const TrackerEvent = {
   start: "start",
   stop: "stop",
   requestWorkedToday: "requestWorkedToday",
+  checkIfCurrentlyActive: "checkIfCurrentlyActive",
 } as const;
 
 export class Tracker extends EventTarget {
@@ -37,6 +38,7 @@ export class Tracker extends EventTarget {
   public running: boolean = false;
   public workedToday: number | undefined;
   private interval: number | undefined;
+  private checkedIfCurrentlyActive: boolean = false;
 
   constructor(context: string, running: boolean) {
     console.log("Tracker.constructor(context, running)", { context, running });
@@ -52,6 +54,10 @@ export class Tracker extends EventTarget {
     if (typeof this.workedToday !== "number") {
       this.dispatchEvent(new Event(TrackerEvent.requestWorkedToday));
     }
+    if (!this.checkedIfCurrentlyActive) {
+      this.dispatchEvent(new Event(TrackerEvent.checkIfCurrentlyActive));
+      this.checkedIfCurrentlyActive = true;
+    }
   }
   public get settings(): PluginSettings | undefined {
     return this.#settings;
@@ -62,14 +68,19 @@ export class Tracker extends EventTarget {
     return Math.floor((new Date().getTime() - this.startTime?.getTime()) / 1e3);
   }
 
-  start() {
+  start(startTime?: Date) {
+    console.log("Tracker.start(startTime)", { startTime });
     this.running = true;
-    this.startTime = new Date();
+    this.startTime = startTime ?? new Date();
     this.render();
     Tracker.pauseOtherTrackers(this);
-    this.dispatchEvent(new Event(TrackerEvent.requestWorkedToday));
-    this.dispatchEvent(new Event(TrackerEvent.start));
     this.interval = window.setInterval(this.tick(), 6e4);
+    if (!startTime) {
+      this.dispatchEvent(new Event(TrackerEvent.requestWorkedToday));
+      this.dispatchEvent(new Event(TrackerEvent.start));
+    } else {
+      // A given start time means that the tracker was started in the backend.
+    }
   }
 
   tick() {