I am also having sound issues with pipewire errors in the logs. Sometimes sound will work and then pulseaudio crashes and won’t have sound until I reboot.
I did find the following on the forums which seems to have helped (I don’t have NVIDIA, but still helped with PulseAudio):
But this seems to just be disabling the pipewire socket and not actually “fixing” the issue, but it has worked for me for a few hours. Pipewire 0.3.15 is not in the testing repo yet, but I’ll download from the Arch repos and see if I have any crashes with that version.
Definitely something to look into because I also had issues after pulseaudio crashing with videos and general system performance until I rebooted or at least signed out/back in. Was making my system generally frustrating to use.