Win11 GIMP 2.10 artifacting/damage bugs?

[bolete2]

(08-31-2022, 09:45 AM)bolete2 Wrote: Hello, it's been a long time since I last perused the forums. I've been greatly enjoying 2.10, I can't wait to try the next release!
I have not encountered the following problem while running 2.10 on Gimp Linux AppImage. I have had some weird bugs associated with GMIC on Linux with GIMP 2.10, but that's a different issue. This seems to occur solely with 2.10 using default features on my Win11 install.

Black "stains" will suddenly appear, usually as a result of a default filter being applied or by messing about with layer modes. Even if I undo the effect/mode change, the black spotting will not necessarily disappear, or the distortion will take on a different form. I'll attach a couple screenshots to demonstrate:



The left example was actually spurred by a simple gaussian blur with a a radius/amplitude of <10, which makes no sense to me.
I have not been able to reliably repeat these distortions, so I cannot say what the exact trigger is. It's not from something obvious like blowing out pixels with a Hard Mix mode-- and again, this doesn't happen on my Linux install of GIMP 2.10, just the Win11 one, and effects can persist even after an undo. The only sure fix seems to be deleting the "corrupted" layer(s).  I can provide a link to above xcf though its 380mb ziipped. Does anyone know what might be wrong or if I've done something to cause this?

Thank you Ofnuts!
I had to finish the above project chunk, but fortunately (or unfortunately) another file is experiencing this.
This time, all I did was try to use the blur tool on a normal layer. File uploading now; I'm posting a screenshot just in case others might be experiencing the issue. I was trying to create a blurred light effect on the far right side there, the more I applied the blur the more it grew. It's like The Nothing from The Neverending Story. 



here's the drive link:  https://drive.google.com/file/d/1Jyjc590...sp=sharing
~390mb