I have this as well, or at least something remarkably similar, and haven’t been able to find a solution.
Things in common are:
Complete freezes, sound keeps playing, have to manually kill, seemingly completely random happening in multiple places. No crash reporter.
Things that are different are:
I can utilize alt + f4, but I cannot use my mouse when frozen, so I have to use keyboard to choose the end task button. I cannot minimize the game.
I tried my best at troubleshooting it here (Random but Persistent Crashes, Various Troubleshooting Detailed) but I feel like it was mostly unfruitful unfortunately.
I was wondering if it was something to do with my model of graphics card, but… I guess not. I’ll repost my specs here for consolidation in case it helps.
System: Linux Mint 21.3 x86_64
DE: Cinnamon 6.0.4
Kernel: 5.15.0-116-generic
CPU: Intel i5-9600K (6) @ 3.700GHz
GPU: AMD ATI Radeon RX 5600 OEM/5600
Memory: 16 GB
I’ve also tested proton GE, experimental, 9, and some others, no luck. It feels like flatpak proton performs a tiny bit better than DEB, but it does not fix it.
If you find a solution, please update :o
(My old “solution” had to be adjusted, because my launch options were no longer working correctly and were lagging the game, so I have no launch options anymore.)