My music has always synced to my Android and shown up in Google Play Music with no issues, but I had never been able to get the playlists to appear in the app, so I installed Shuttle. Surprisingly, the playlist showed up in Shuttle immediately.
A few days later I added more music and synced again. After that sync, for some reason the playlists disappeared from Shuttle, but they showed up in Google Play Music, so I switched back.
Now I just synced again and my playlists are not showing up in either app.
I haven't changed any settings or anything like that. What could be causing this inconsistency and what can I try to fix it?