FNA 25.03 SDL3 - Problem with RenderTarget in WinForm

[Predator75]

Hi,
there is a problem with SDL3 (Fna 25.03) and WinForm, both .Net and FrameWork 4.8.
My project is a winform with FNA hook in a Panel.
With FNA 25.01 all works OK.

Upgrandig to 25.03 and sdl3, there is a problem with RenderTarget.
For example if I have 3 object to render, it render at the first a black screen and next, only one object, always.
It is enough that the project is winform to verify the problem, there is no need to embed fna in a panel.

I have do a litlle demo project, try to click to one square, it save 3 png, first click black screen and next the same object istead all:
and from the second click it save all the same image, instead the 3 differents object

https://www.eprimeos.com/download/temp/SinDestinyGameEditor-004.rar

If you use the same code in a console project, it works correctly.
if you use the same code with fna 25.01 and sdl2, it works correctly.
Best

[flibitijibibo]

Does this still happen if you force D3D11?

[Predator75]

I have just set -gldevice:D3D11, the problem seems to be solved

[Predator75]

with OpenGL works, too.
But there is there a strange thing, in the project with FNA embedded in a panel, when I use the rendertarget the fna window becomes black for a moment.
I'll update you with more tests