Yep, I've experienced this issue and I hate it. It is indeed bad
The basic formula is, have a track or groups of tracks with alternate playlists. Go to playlist view. While playing back, make any kind of edit to an alternate playlist (i.e, cut a clip, move the clip, delete the clip, etc). The playlist that you're editing doesn't have to be solo'ed for it to momentarily stop
I think this is some kind of buffering issue? I seem to only be able to recreate it when there are a lot of playlists, some plugins on the track, that sorta thing. Still super annoying though, and didn't used to be an issue. I think it started to happen when they introduced the target playlist features