The android widget goes blank after a few minutes of not playing music, even if Spotify is open in the background. Therefore to start listening again, instead of just playing play on the widget as I'm sure your supposed to do, you have to reopen the app and press play on there. The widget should keep info permanently, or at least have the option to, so that if I want to resume playing after a period of time, I can literally press play from my homescreen. I'm sure I've used music players such as apple which even if phone has been restarted the info is still there. Please look at adding this option as without it the frustrating widget is pretty much useless