I created a playlist the other day with a little over a thousand songs and set it to be available offline. About an 8th of the songs have already been dowloaded from previous playlists that I have available offline. Only now, it won't dowload the rest. It says downloading music, but is locked at 31 songs. The swirling icon to show it's downloading a song won't show up on any of them. I checked my storage and I have about 7g available. Please help!