@Speed7 This might help.

@Bar666xp You can link IP addresses to MAC addresses. Does you third party mesh act as an AP or as a Router? If it acts as an AP (no NAT), the Deco will see each device as coming through wire, and...

@neilbaker86 Is the wifi active on the Virgin media hub? If yes, do you have same issue when you disable it?

@cgarry The backhaul should automatically use all available bands. The app shows, in the details of each satellite Deco, the bands actually used.

@GaborN I suggest comparing the response given by https://test-ipv6.com/ when going thru the Deco or not.

@Bar666xp The main, guest and IOT "wifi networks" offer some isolation, but all devices are in the same subnet. A device must know the wifi password to connect, they should not be "transferred" to...