I understand the nature of troubleshooting, but I don’t think testing a 45 GB game is feasible off of a live distro, and any way to test it on my hardware outside of logs is a whole lot of work to get one game working; I don’t have a spare drive around either. I just figured these errors would mean something to someone who could take action on it to make a better Proton for everyone. I haven’t checked the kernel yet, but my version of mesa matches the latest stable version in your link.
EDIT: I did find this link that sounds like it’s a mesa bug. I’m on the same major version but a different minor version.