Google Home App Groups - casting stopped

RetSol

The Google Home App has stopped allowing me to cast my phone to a speaker group.  Casting to a single speaker still works. 

Any suggestions about why this is and how to fix it? 

wongataa

Restart your phone and router.  That's what I would do first.

RetSol

wongataa said:

Restart your phone and router.  That's what I would do first.

Thank you but nope. Hasn't worked.