I suppose I should give an update.
They advised that the memory stick was faulty and replaced it with a "known good one", I also note I am now running 2022.16.3
What I will say is that I don't seem to be getting the red X on the dash-cam icon or the errors, one was to check the usb drive and the other complaining about speed.
But I am still finding clips are not being saved as they should, additionally, there was footage on the usb when I collected my car, which did not play properly, would just stutter and reset continually. Now as this was a new or at least a "known good" usb stick, I would have thought any footage on there would not have had any issues.
I reported it again as soon as I got home following the service visit by replying to the messages relating to the service but haven't heard back. I guess I'll need to open a new request and go through the whole, remove it and reformat it nonsense again before they actually do anything.
On a positive note, I now have charge stats showing on my app, which I didn't before.