Sometimes buffers degradate to black

[hybridherbst]

Not exactly sure how to title this issue correctly;
while testing a few more "clean" models to learn more about how realism-effects works I ran into a strange phenomenon:

Screen.Recording.2024-04-13.at.16.16.07.mov

I encountered that a couple of times after refreshs as well, but I don't have clear reproduction steps unfortunately.
The model was this one:
AmbientOcclusionTest.glb.zip