Hello @CSV-12, we're using one issue report per unofficially supported game title, so I've gone ahead and transferred this issue report to https://github.com/ValveSoftware/Proton/issues/938#issuecomment-1567072784.
Squad needs 11GB of VRAM.. you are just running out of VRAM
@mikk150 What do you base this on? Win10 has no issues whatsoever with 8GB VRAM.
Compatibility Report
System Information
I confirm:
Symptoms Several Proton versions runs GREAT (45-65fps), one or two map sessions, typ 37% - 50% kernel load, max graphics settings , then slows down to 5-10fps and kernel load drops to 6-10%, after a map change.
Logfile:
https://drive.google.com/file/d/1I4Wgc4buGZ2EUtdtENa1SHpfRwHNW7xV/view?usp=sharing
Reproduction
Just run the game a few times.