My first reaction would be to blame bug 1876632, but if you've not put the machine to sleep then it's unlikely to be bug 1876632.
The screenshot in comment #1 does show some thin sections of wallpaper at the bottom and right edges, so it seems the problem here is just the desktop icons window has become opaque somehow. You should be able to test that by opening the Extensions app and disabling Desktop Icons.
Thanks for the bug report.
My first reaction would be to blame bug 1876632, but if you've not put the machine to sleep then it's unlikely to be bug 1876632.
The screenshot in comment #1 does show some thin sections of wallpaper at the bottom and right edges, so it seems the problem here is just the desktop icons window has become opaque somehow. You should be able to test that by opening the Extensions app and disabling Desktop Icons.
The same issue affects the new Desktop Icons NG extension too: https:/ /gitlab. com/rastersoft/ desktop- icons-ng/ -/issues/ 211