Hi Mac,
Sorry, I don’t have a technical bone in my body when it comes to cars! All I know is that the entire loom was replaced which took a whole morning as the back windscreen had to come out. If your dealership contact Jaguar technical I’m sure they will be able to advise, this was all done per their request to see if they could find a solution to the problem.
Recently though my dealership said the issue had been resolved on other vehicles using a software update.
Sorry I can’t be of more help.
Ceri