So I have the Spotify app on my iPhone 6 iOS 8.1.3 and I was having problems syncing some local files to my phone when I first installed the app. I found a workaround by changing the artist or song names of the files slightly  in order to get them to sync, but after about a week, the files are in the playlist I synced and in my Local Files playlist, but they appear in the shaded-out font and can't be played. Whenever I try to play one of these local files, it says "Song not synced."

I think my iPhone restarting may have triggered this, but I'm not completely sure. Just wondering if anyone else has come across this, and if there's a solution out there! Thanks in advance!