Project media icons, source monitor and program monitor solid green
Using a late 2013 Macbook Pro Retina, 16Gb ram, with the optional NVIDIA GeForce GT750M 2Gb, Big Sur 11.7.1 and Premier Pro version 23.0.0 (build 63). Premiere defaults to opening with File>Project Settings>General>Mercury Playback Engine-GPU Acceleration (Metal)-Recommended. Apple System Information states "Supported, Metal GPUFamily macOS 1".
With that recommended GPU acceleration selected, the clips in icon view display fine until you mouse over them, then they turn green. The Source and Program monitors are always green. Scrubbing the timeline or clip icon will produce additional streaks of color, but they always start off as green. System Compatibilty Report shows No Conflicts To Report. When I select File>Project Settings>General>Mercury Playback Engine Software Only, the problem goes away.
Everything appears up to date as far as I can tell. I have also tried the Shift+Alt startup as well (mostly to clear stuttering problems but it doesn't cure the green screeens).
Anybody having this issue or have any thoughts? Here's a screenshot:

