Interesting, this seems very similar! Sometimes pulling out of the driveway I can see the flicker of a car that’s in the distance on the screen, but then nothing else the whole drive, so could possibly be something heat related, I never thought of that. Have service tried to tell you it’s software related or are they happy to take it in to take a look? They keep cancelling my service requests due to it being a 'software' issue so I can’t even get anyone to look at it.
Your issue seems to be similar, but not identical to mine. Here's a photo (blurry) showing the static driving display on my car. I don't get any lane markings or anything camera-related at all. No parking sensors or anything. Service has not yet blamed software, since I made sure they knew this was intermittent and had been occurring off and on over the past 4+ months. I have tried recalibrating the cameras as well. The only thing that seems to help is resting the car overnight, and even that doesn't always work. Once I saw the animated driving display come on for a couple of seconds and then off, then on and off again. Every other instance the driving display is simply frozen and static from the instant I power up the car.