I've got a playlist of Super Nintendo SPC files, and specifically on the songs from the game "Equinox", some sort of "helpful override" seems to be kicking in, and ending the song before it's really finished.
What's funny is the song length shows up correctly eg. 7:41, but Audacious advances to the next song very early, eg. 1:35
I am not sure if this is some silence detection in the general Audacity settings, or something in the playback plugin for the SPC files, but I couldn't find any settings that made a difference.