SomeThing went wrong

[KOREACHOi]

I have one Google Nest Hub in my home room and one Nest Hub in the kitchen. And there is a Google Home Mini in the closet.

There was a problem when two hubs in the main room and kitchen and one mini in the closet were grouped into speaker groups and music was played. There is an error message asking you to try again.

If only two hubs in the main room and kitchen are grouped into speaker groups, it works normally. (Song plays at the same time in two units.)

I think it's a problem with Google Home Mini in the closet.
Rebooting is useless and re-registration is useless.

Please help me.

[GothamNY]

Is it possible that the closet walls, doors, etc interfere with the WiFi signal? Is it possible that the location is too far from the router?

[KOREACHOi]

No, I've already moved Google Home Mini from my closet and tried it right next to the router.

Unfortunately, however, the results were the same.

[GothamNY]

Try factory resetting the misbehaving mini and setting it up again from scratch which is different than rebooting it.

[KOREACHOi]

I solved it. In conclusion, it was a Wi-Fi problem. Some Wi-Fi was connected to 5ghz, and some Wi-Fi was connected to 2.4ghz. I hope Google will update me so that I can send a message that Wi-Fi is different in this situation.