It certainly sounds like it and will only get worse until the set top box packs in completely.
I'm afraid the only solution is to contact the VM Faults team on 150 from a Virgin landline, or 0345 454 1111, options 1,1 and 2 (Faults) butbest to call at 8am, or late afternoon around tea time to avoid call queues..
When calling Faultsyou will get the automated response asking you to press 1 for the link to online support, perform tests, reboot etc. Ignore the options and don't press any buttons then you should be placed into a queue and an agent should pick up the phone and resolve the problem
The Service you do for others is the rent you pay for your room here on Earth - Muhammad Ali
I have been able to locate your account and can see that you have two boxes at the moment. Which box are you having the issues with? Our system has ran some checks and says that there should be no issues but clearly there is.
If you could advise which box the problem is with, I can get this looked into further for you.