[2022] Crusader Kings 3, Linux Version, Crash on save. (Arch Linux) [WORKAROUND FOUND]

NikolajRC said: To be fair, I am playing the steam release on Arch Linux, and not Ubuntu/Debian, which I doubt the game was even tested on

This is most likely the problem as the game was built for Ubuntu. It hasn't been tested on other Linux builds and since you're using a build we don't support there's not really anything we can do for you. That being said we do have quite a few Linux wizards in the community so there may be someone in the same boat as you that has solved it somehow and is willing to share the workaround.  

Crashes that happen after some hours' play (in any game on any OS) are usually overheating, but I can't see why that would only happen on save operations. You could check the CPU and GPU temps after say 1 hour of play though.