We had no more cutoffs so far on the Linux version and it also seems to function same as the Windows version with no issues to report yet.
An update is that it seems to happen more and quicker in sessions with multiple players then a single player.
Having mic cutoff issues on steam deck proton experimental. Possibly a performance issue happens more often later into the session also sometimes see lag spikes or get stuck lagging eventually too.
Do you have the halloween one too by chance?