I have had this problem on my I-PACE since delivery. Happened a few times early on in very heavy rain, now happening every time it rains.
Very irritating as living in the UK it rains a lot!
Went back to Jag last month for a recall and I added this to the list of issues. Was told it was probably because it was raining but they would investigate - looks like they were hoping a software reload would fix it. It hasn't.
Taking it back but not being fobbed off with the rain excuse. It's an expensive option and should work in non-extreme weather conditions!