Halo MCC keeps randomly crashing while loading into a match

Title says it all. I wanted to revisit Halo for the first time since switching to Linux and ran into this bizarre issue. It especially sucks because 343, in their infinite wisdom, punishes leaving SSBM based matches in these ~20 year old games.

I've already tried multiple suggested fixes (like swapping to an older proton version, deleting the old proton version and then starting up with v7, etc) but none of them fully fix the issue. At best, they decrease the frequency of, but don't eliminate, the crashing while also adding a distracting stutter to the first couple minutes of every match.

What's also weird is that the crash rate significantly decreases after the first crash per PC restart. I can consistently get a few games in after the first temp ban runs out, but this is obviously not very ideal.

Thanks in advance for the help!