probably worth starting with a 60 second pinhole reset of the hub - depress the reset button for a full minute, then leave teh hub be for 10 mins - don't switch it off, just let it recover till it's fully back up and running... then follow this sequence..
Log into the hub on http://192.168.0.1 and select the option to put the hub into modem mode
The hub will then reboot and come back up in modem mode - give it five minutes to settle down
Disconnect all ethernet cables from the hub
Power off the Hub and your router/mesh system
Connect your router/mesh system to the hub via ethernet cable and switch it on - leave it five minutes to settle down
Power on the hub and leave it five minutes to settle down