Also happens on Android devices. Bose Bluetooth headphones support multiple concurrent connections so they drop from the device that's not talking to them. Consequently at the end of an album, the headphones drop and Spotofy app stops working. Restarting Spotify and reconnecting headphones fixes it, but I would expect that Spotofy should revert to default output device - i.e. my tablet's speaker.
Re: Spotify Skipping every song, not playing for more than a second