See also these recent threads:
https://www.googlenestcommunity.com/t5/Speakers-and-Displays/Google-Nest-Hub-Cast-Stops-working-after-a-few-seconds/m-p/4673https://www.googlenestcommunity.com/t5/Speakers-and-Displays/My-Google-Home-connected-to-Spotif...
This problem description matches exactly what I am experiencing: if my
Google Nest Hub is in a speaker group with other devices, casting
Spotify or other audio to a speaker group will start BUT always stop
playing after a few seconds.While testing to...