I have been using my Spotify to control my sonos speakers wihout any problems for a while. The other day all of the sudden it started having issues. Whenever I adjust the volume from the lock screen or the app the now playing info vanishes. It stays gone usually until the next song starts. I can continue to adjust the volume but cant skip song, pause FF or Rewind. This issue occurs on my iphone 8 and my pc. I have removed spoify from sonos and re-added it, reinstalled sonons, reinstalled Spotify, reset router. Pretty much out of troubleshooting ideas.