Howdy! Imma premium user of Spotify who loved to save my favorite songs into 'Your Music' library, rather than save them into a playlist, and using WiFi connection.
When I turned off the connection (both data usage and WiFi, or just switch the app into 'Offline Mode'), when I fresh start the app and play a selected song, the song just played for a while before it stopped. The song is only half played. I can't continue the song, and only just skip the current song. When I swipe back to the latest 'error' song I heard, the Spotify app can't replay the song. I thought the song was 'deleted' automatically so I can't replay it, even if it's already saved offline.
I don't know how this problem occur, but perhaps there's a bug of newest update of Spotify for Android. I have never experienced this before (with older updates). I hope the Spotify Core Team can nix this.
FYI, my Android device is Xiaomi Redmi 3S.