
:testing and stock SteamOS) is that quantum on SteamOS is 256 by default and on bazzite is 1024. Not sure yet whether this would indeed be the main root cause (or something more in-depth), but we'll see. At the very least, comparing journalctl --ho-hostname --user -u pipewire -u pipewire-pulse -u wireplumber -f outputs between the two (when running said game) yielded nothing of value (logs are pretty much the same between the two).
rpm-ostree override replace with the older packages
journalctl --ho-hostname --user -u pipewire -u pipewire-pulse -u wireplumber -f rpm-ostree override replace