In case it hasn't been discussed - Mesh wifi systems can be troublesome for IoT/smart home devices. Products like smart thermostats, switches, light-bulbs etc. I found this from an online source:
"Google WiFi Dropping Connection? The Google system by default tries to move 2.4GHz devices to a 5GHz connection. Since IoT [smart home devices] can only connect on 2.4GHz, this causes an almost infinite loop of your Devices connecting and disconnecting. "
So after a bit of searching, it seems the workaround for this is to create a 'Guest Network' on Google Wifi with a different SSID (wifi name). The guest network preferentially broadcasts in 2.4GHz. Personally, I run 5 Mysa thermostats in my home and was worried about their connectivity.
I also reached out to MYSA for their advice and they reiterated
"Hi Jack, Our customers experience a bit of trouble with the mesh systems as the networks cannot be split. The workaround is to create a Guest network - which would usually be a 2.4GHz network and connect your Mysas to that network.
Mysa Customer Care Team"
I hope this helps any of you guys and gals who were having these issues.