Until recently, when I was playing one of my Sonos playlists on my Sonos One stereo pair with GA, I could ask “Hey Google, what’s playing”, and it would tell me the song title and artist. Yesterday I noticed that it now responds “Nothing is playing”, even though it is of course playing my Sonos playlist.
I have an Echo Dot in the same room that has the Sonos pair set as its default music output. If I ask “Alexa, what’s playing?”, it automatically knows that I mean the Sonos speakers, and it tells me the song title and artist as usual.
So, looks like another new bug between Google and Sonos...