G18 intermittentantly goes offline. Firmware update?

My G18 keeps disconneting (no access to internet) although on the app everything appears fine. Even looking at the devices connected, there is a wifi symbol but no internet connection. We are constantly restarting our G18 maybe 3-5 times a day due to this issue.

Internet provider says nothign is wrong with the actual internet or signal, likely the modem itself.