peter Perfect! Thank you.
For me, that's a better approach than forcing every song individually to auto-play. The decision to auto-play a particular track is often based on where it's sitting in any particular playlist (e.g.what song precedes it). So, it's not the case that any particular song will always auto-play.
Also, fixing this bug also addresses the main topic of this thread. I can play my last backing track before a break, and auto-play to another list which is 'background music' during the break.