Thank you for teaching me a new word. Was this situation really homologated by JLR? I can't imagine that they would say to you "yeah you're using a 7kW cable but the car is designed to use only 3kW."
I am using a generic 7kW charging cable ... invariably (to my frustration) the car starts throttling the rate of charge downward after ~30 min or less. Same has happened to me on a commercial ChargePoint charger at a hotel overnight, and I was dismayed to learn that I would have to spend another two hours in the sihtty hotel room to wait for 100%, which I needed at the time. The solution is always (in my case) to unlock the car, unplug, plug back in. Then it keeps charging at 7kW. It's a bug. Your situation may be more severe, given the ominous sensor issue.