Could be anything .. have you run a mesh test to ensure you are seeing a great connection? Would suggest rebooting the network via the Google home app as a first step, and running a mesh test. If the connection to each point isn't showing great, adjust the locations of the points and try again.
I just wanted to jump in real fast to see if you saw Ashepherdson's reply and to see if you still needed some help on this or if you were able to get it sorted out. If you are still needing some help, just let us know and we'll be happy to continue helping.