For months now and then I get the game giving me a black screen on startup, that happens rarely with the Steam Overlay enabled, finally caught it in terminal @jables @SXX
As far as I understand it's crash within Steam and not PA/Coherent,so you're probably want to report it to Valve: https://github.com/ValveSoftware/steam-for-linux/issues
I do have one open https://github.com/ValveSoftware/steam-for-linux/issues/3601, strange how it only happens with PA though for me.