I guess I can just create another UV map where the faces aren't collapsed to 0, but a slightly bigger number, just for the texture painting part and still have it work for the shader effect on the…
I just opened the lid on my laptop and the issue was back.
I have not used Blender on Linux before. This is a fresh install.
After a restart (and a system update) the issue is gone. Maybe it had to do with this which I encountered at the same time, I don't know:
Can't replicate it in example files. Happened in very large files with lots of linked objects at work, which I can't share without NDA.
Yes it persists. See the video recorded with the 4.1 beta from the link you sent.
I have the same issue. Blender won't update, Affinity won't update. Users stuck in the middle...