Severe Stuttering/Choppiness Around Multiple Zombies

[PewP3r]

Whenever I encounter several zombies in an area, say at night when they start banging on the walls of my base or even in a POI with three sleepers that awaken and come after me, my game immediately starts stuttering and getting choppy. Back in A19, I remember this happening for a while and I think the fix was to get some utility that let you select how many CPU cores you wanted to use for the game. If I turned off the virtual cores and enabled 4 of the normal ones, it went away. I've since upgraded to Windows 11 (fresh install, highly optimized for gaming) and it seems like the issue is back in A20. Pretty much makes the game unplayable.

 

Has anyone found a fix for this? I've tried lowering UMA textures, lowered viewable distance to medium, turned off the "mesh" stuff... Out of options.