I can’t believe Sonos has not fixed this yet.
EVERY Sonos update I have done in the past year from my Android phone has resulted in all playlists in ‘On This Mobile Device’ to be empty.
The music is on my phone. I can play songs and albums fine. Sonos sees the playlists, but all playlists show “No selections are available”.
The only fix I have found is to delete the Media Library storage, but then I have to redo all of my notification settings. I am not willing to do that anymore.