When playing a playlist that has both local files and spotify songs, music will stop playing once a local file song has played all the way through and finished. Spotify will change to the next song, but no music will play, and no matter how long you wait (even until the end of that next song) no music will continue to play until you physically press the next song button. The time counter keeps going up even though the music isn't playing and pressing the play/pause button will not make the music play. This has been an ongoing problem, and I have updated spotify three times to newer versions and it still happens (also on the current version). I have also reinstalled spotify and it has not fixed the problem. I am also running the most recent iOS (has been a problem on iOS7 as well).