why is Sonos Favorites greyed out?

That’s exactly what I’m seeing too.  What’s interesting, my now linked music library now shows up old queue’s. They show up correctly too, not greyed out. Play when pressed. Other linked accounts don’t, like Plex, but Pandora does. Seems there is a bug in which ones work correctly. Favorites for music library, Pandora all work correctly now. But others don’t. Sonos might get it fixed after 4 more updates, but I’m afraid they might break something else. 

My PC app works.  My iOS app works.  My Android app has half of my favorites greyed out.  I have deleted and reinstalled the app countless times.  This has been going on for weeks!!!

I’m having the same issue with my Plex albums. What I noticed is that when I add an album to the favorites, what actually gets added is the first song in that album and the selection is greyed out. This used to work in the prior app so I hope it gets fixed soon. I reported it right when the new app came out but they haven’t fixed it yet. 

same problem here on Android!

Same issue here all!  What makes this even worse is I only get to choose from my favorites to set an alarm on Sonos now with this new (redacted) app! Guess I’m stuck with what my alarm is currently set to until Sonos rebuilds this app from the ground up.  What I currently have in my hands is a big pile of kaka.  Get all your doodoo together Sonos, get it all together and put it in a bag, and go sell it at the kaka store!

Hmmm…I can set a favorite on iOS and it appears on my Android device and vice-versa.