It became unusable for me today, for the first time. I've been consistently using Spotify for quite some time now and it worked when I upgraded to a 950 DS (US variant) a little over a month ago. As a reference, my phone is on the latest non-Insider FW and non-Insider Build. This morning, after selecting a song from one of my playlists, it would play 2 secs of the song and then stop. After attempting to try another playlist, the same thing would happen. The app also crashed a few times during my multiple attempts. I uninstalled the app and then re-installed it, but it still exhibits the same behavior. The last time it worked for me without issues was about 3 days ago.