Hello everyone,
In another thread someone posted a fix, and I have applied it and IT WORKS.
I had tried this fix in the past, but you have to restart your computer after applying it.
The fix is registry edit from NVIDIA here: After updating to NVIDIA Game Ready Driver 461.09 or newer, some desktop apps may flicker or stutter when resizing the window on some PC configurations | NVIDIA
The issue for me is finally fixed (been working for a few hours now with no black popups and no menu glitchiness.
Again, the important part is restarting your PC after applying the fix.
Hope this helps.