Same here - still not fixed.
On my Essence MK2 a daily reboot solves the issue.....why is a mystery.
But after that it shows up in the Google Home/Spotify apps as a chromecast device and works well.
(N.B. I have no groups, since I donβt use cast for audio that much).
MM
Same here with my Essence MK2. since I use Groups, I thought that might be (causing) the problem, but apparantly not.
Maybe when you use other GC devises in the network (not in a group, but seperately)? I also notice a difference in behaviour when starting a GC stream from the app directly or by using google voice assistant.
Let's hope the upgrae will be rolled out soon!