Like many others I also get intermittent pixelation on all channels both live and recorded.
I have had countless engineers out over the last 3mths as well as network people out but still no resolution. Everything from the v6 box to the pit outside on the pavement has been replaced but still no joy.
Totally fed up with wasting my days on the phone and waiting in for engineer visits for them to find pre faults then have the issue referred to network and for them to say they can’t find any faults putting me right back to square one.
Thanks for posting and I'm sorry to hear about what's happening.
I'd certainly like to take a look at this for you along with registering your dissatisfaction so I'm just going to send you a private message which you will find if you click on the purple envelope at the top right of the screen.