If I play a playlist in the official Spotify Android app and then cast to my Sonos Roam, whenever it automatically moves on to the next song it won’t update the song title, artist, artwork in the app or notification controls etc…
It does update when you change the song manually.
It also works as expected in the Sonos app itself.
This is using a Samsung Galaxy S7 Edge with Android 8 installed and the official Spotify Android app version 8.6.18.720.