Cannot configure parental controls

Firstly I have to say that I'm fatigued with the constant stream of issues I've had with my Orbi over the last few months. No premium device should suffer this many problems. The flakiness of the firmware is frustrating and the support experience is painful.

I've had this particular issue for a few months through various firmware releases. It looks to be an issue that affects multiple Netgear devices for the last few years but I can't find a conclusive solution.

I'm running the latest Orbi firmware and the latest version of the Genie app on Windows, iOS and Mac.

When I first setup the Orbi after a factory reset it's posible to successfully setup the controls via the Genie app. Within a few days I can no longer change the settings per device and then when I select the Parental Controls option it makes me login. If I try an existing account or a new account I get the error "There was an error signing in, please make sure you're connected to the Internet and try again."

I've tried resetting the password, creating new account etc. I can successfully login to the Netgear Open DNS web portal. The only thing that fixes the problem is to factory reset the Orbi. This will then last a few days before the problem starts again. I've tried the Genie app on different platorms and even tried older versions I've found on the Internet. 

When I Google the issue I get posts going back to 2014 but no definitive solutions.