Halo MCC very crashy with 3.6

[Broseph Joseph]

As title, since updating to 3.6.3, Halo Master Chief Collection (default valve selected proton 9, but ive tried it with 8 too, no difference) has become incredibly prone to crash, and crash the whole OS session too.

It seems to be related to the OS audio server, i say this because the menu music will keep cutting out and coming back in and i observe via htop running in an SSH session on my deck that wireplumber is continually crashing and restarting. Ive also found that trying to change the output volume in the quick menu whilst MCC is running crashes wireplumber like clockwork. So this is a very reproducible bug. Eventually the steamOS session itself will crash and restart too.