I too have this same set of problems and sadly it does not appear that Virgin Media (VM) have neither firmly acknowledged in this forum that there is indeed a problem, nor offered any kind of resolution nor hinted at any kind of eta for a formal fix.
I have been a VM customer for many years and have operated an IT Consulting Company for a lot longer and we rely on VM to be able to work from our home/office and we expect/have to be able to manage our own network.
Not being able to perform simple admin tasks on a VM Hub 4 router means that we simply cannot manage our network and this effectively means that VM are not providing the service we are paying for.
.. which, btw, is for a 1Gbps+ download service .. of which today I was getting around 56Mbps max .. not good for our work at all.
I shall be calling VM tomorrow to see what they can do to resolve this sad situation, but as an IT Consultant I am not prepared to get the technical run-around from Customer Support who probably/maybe know less than I do.
Maybe a Hub 4 to Hub 5 upgrade would fix all the issues, who knows, but then I bet there is no migration path for network settings from 4 to 5, which means typing them all in again and then testing again .. which means a lot of down time .. which we can ill afford.
Any/All VM comments and feedback would be welcome 🙂
Cheers
SteveB45