Usually I could play on Spotify and my Sonos app would automatically detect it, so my current Spotify song would also appear in the Sonos App and vice versa.
Since the last update, it seems Sonos doesn't recognize it anymore and both apps have parallel sessions running. This results in the Sonos speakers not being able to be controlled properly, unless I enter the Sonos app and "re-start" the music accessing through its own app.
This seems to be an issue only since the last Sonos update