So, any relatively new smartphone or Windows 10 user has the option to randomise the Mac address.  This means that any parental controls are totally overridden on the Deco.

Black listing the device doesn't work as the network sees it as a new device.

There is no white list option and no method of requiring permission for 'new' devices to join the network. Essentially, so long as my young teen has the WiFi password, he can bypass ALL parent controls simply by toggling his phone/laptop to randomise the Mac address. If I'm constantly monitoring it, I can boot him off. But I have to work and sleep sometimes! 

I can see this was raised as an issue back in 2019 with the response to 'wait for news' on the website. I can't see that anything has changed? Other companies do seem to have updated their systems e.g. keenetic (I can't link but they have a nice helpful page on their website showing how their white list system works to prevent this problem).

It's a shame as it's otherwise great but since I bought it last week mainly on the back of its excellent parental controls I can see it going back....

Any updates on this issue?