Strange picture rendering after restart() with LWJGL3

Hi, perhaps you can give me an idea where to look for a solution:

When I switch from fullscreen to windowed mode (or vice versa), some pictures with NiftyGui are rendered in a strange way:


Resizing the window itself does not cause any problems. I use the latest stable jme with LWJGL3.
Any hints are appreciated.

Thank you.

I’m surprised that it came up at all. There is currently a known issue with restarts now working with lwjgl 3.

Thanks for the hint. Now I am even more confused. My issue was with

When I put OPENGL32 or higher, the fullscreen stay black.

So with LWJGL_OPENGL2 it works bot not the nifty renders of the pictures, with OPENGL32 or higher the fullscreen stays black…

LWJGL3 context restart does not re-enable rendering · Issue #1445 · jMonkeyEngine/jmonkeyengine · GitHub (already mentioned)
And this: Nifty GUI doesn't display correctly after context restart · Issue #1013 · jMonkeyEngine/jmonkeyengine · GitHub