I have about a thousand files synced offline on my Android ( GS4 Sprint ), and almost every time I connect to wifi, Spotify has to re-sync a dozen or so songs. When I am traveling without internet access, I see more and more songs greyed out from my playlist as time goes on.

Spotify is saving the songs to my SD card, as opposed to the internal storage. So I tried different SD cards, and the same problem keeps happening. This happens with new and old songs in my different offline playlists.

Obviously it is a huge problem to randomly and repeatedly lose the songs I want to listen to without having internet access to re-download the songs.

I can't find anyone else posting about this, am I the only one? Is there a solution?

Thanks