I have a playlist that consists of mostly streamed music but also some local music on my computer. I'm trying to synch it to my phone for use offline by my phone. The synching works fine for the streaming songs, and it also works for some, but not all, of the local songs. I've tried restarting/reinstalling on the phone, making sure the local music at issue plays in my computer's Spotify, etc. Nothing has totally fixed it yet. Any ideas?