This post was for the previous version which for some reason didn't have
the pair option. The latest has it. Now I get both the options of pair
and group, and both work.
Stereo pair is no longer an option in Google Home (latest version) may
be that has to do something with your specific issue. For me the issue
got worse when I updated to latest google home app.
I had one google max speaker which I had it in a group with google mini.
That used to work most of the time. I bought another google max speaker
hoping to use it as a stereo pair, only to find out that option is no
longer available. Anyways I added t...