I manage a bar and we've been using Spotify through the Sonos app for the past 2 months without any issues. The problem started yesterday : we select one of our 4/5 playlists and hit play,the thing works perfectly for about one hour and then all of a suddend an unkwon and not on our playlists song comes out. If I open the Ipad we use to control the system it just say " now playing on spotify" and the whole thing won't stop,it seems Spotify takes over the system. Whatta heck is this ?? How can I prevent this not to happen ?