tried uninstall reinstall?
I tried that, but it didn't work. Still, thanks for offering help.
I figured out a way to fix both bugs I talked about in the first post: change the compatibility tool from proton-cachyos-11.0-20260602 (steam linux runtime) to Proton Experimental.
finally i got 3 reputation i can now post more daily
Congratulations, and God bless you 
I checked. I'm on version r5328 of Plutonium. That's the latest version as of today. I'm not on Windows. In my first post, I said I'm on CachyOS.
After starting the game, the music plays, but then, after a few seconds, it stops playing. Also, when I try to load a zombie map, the game freezes during the loading screen and starts using a lot of my CPU. I'm on CachyOS.
These are recent bugs. In the past, they didn't happen on my Linux PC.