I don't think the playlist thing is related to the breach at all. This is likely just a side effect of the new version being an entirely new Android app instea

I don't think the playlist thing is related to the breach at all. This is likely just a side effect of the new version being an entirely new Android app instead of an upgrade to the existing one. If the local playlist data and/or offline settings were sandboxed to the old app, a new app wouldn't be able to access it.