At various times, I am completely losing my network connection.
The problem is worst when playing on the Xbox, usually when I first play. This is over a wired connection to the modem, and I have tried 3 different Ethernet cables and through the Wifi. Makes no difference.
I experience a loss of connection on my other WiFi connected devices too. My phone and PC have both lost the networks at one time or another.
The status light on the front, shows orange all the time. This used to be white. Sometimes the WiFi light will flash, sometimes not.
After 20/30ish seconds, the connection will be back and I can continue with what I was doing.
Is there anything else I can do to help diagnose the issue?
It's disappointing to hear the issues are ongoing since the replacement hub. Checking things over from here there's no obvious issues, everything appears to be working well. Are you able to try setting up a free “Broadband Quality Monitor” to monitor the state of your connection and record any network dropouts? This may help us identify where any issue lies.