I’m running Audacity on Linux Mint 19.3 I just updated from the 3.0.2 version from the now defunct “Panda Jim” PPA to 3.1.3 from Flatpak. The new version has a slight but noticeable skip at the beginning of playback (audio file attached). Also, in one instance the playback became scratchy and illegible, something that I frequently experience years ago with an earlier version of Audacity.
I messed around with ALSA and Pulseaudio, but haven’t found anything that fixes the problem.
Transport → Transport options → “Software Play-through - On” fixed the problem on my side (Linux mint 21), no more stuttering at the beginning, (Works in 3.2.3 both in the Official AppImage and flatpak versions).
Hopefully this workaround works for everyone until they fix the main bug.