Tahoe Display Resolution Issues

A few weeks ago I made the terrible mistake of upgrading to Marcos Tahoe and since then I have been experiencing a weird issue which is annoying. It seems like the resolution changes slowly and the screen turns off around corners. The only solution I have found is restarting, but after a few hours the issue is there again. I suspect it happens when some app goes full screen, but I haven't been able to replicate it.

Issue, note the corners are not rounded because the top pixels are off:

After reboot, corners are rounded as normal:

[Edited by Moderator]