The local Harley dealer near me just put in one of those KeyWatt by ies 24 Kw chargers in and it wouldn't charge my car either. Chargepoint was no help, and the Harley folks were adamant that it was for the general public to use, but didn't have a livewire bike to test it with yet. Same symptoms as described above. The car completed the handshake and showed an active DCFC session locked the plug and everything. The Charger just keep saying "waiting for vehicle" eventually it would timeout and the car would unlock the plug. I tried everything while on the phone with CP, wanted to try and get this working since its in a great spot for me and the Harley folks seemed happy to have me there. Never got it work after three separate times stopping in and calling CP. Always the same symptoms, the charger just didn't want to finish the handshake with the car.
I think ies has an issue with their protocol, but I can't say for certain that the charger works with other EV's. The charger showed up on the Chargepoint map when it was first turned on, but since then it has been removed from the CP map and no one besides me has checked in on Plugshare at that location.
I have had no issues with EVgo chargers and the Electrify America chargers work well once I figured out the trick i'll explain below. I'm lucky and still have the ChargeNow DCfast on my car until next fall. So I use the RFID keytag and the EVgo chargers have been rock solid using that method.
The EA charger was a bit counterintuitive to get the session activated, but it worked fine once I figured out the App's UI/UX. The EA customer service recommended using the swipe to start in the app, over the NFC tap to start. Once I knew to just try the swipe to start, I found the EA chargers to be quite reliable, but it's not intuitive. You have to swipe the charger that says "unavailable" It's confusing because you're not sure its the right charger or another one that broken or something. It would be better if it said something like in-use or occupied.
The tap to start using NFC has never worked for me on the EA chargers with iOS. I wouldn't count on the card reader either, they all seem broken at the chargers near me. Maybe that's the issue with the NFC, the reader they went with.
So I think the Harley chargers are the issue, not necessarily your car. Was the Jaguar charger a KeyWatt charger like the Harley one? This is the manufacturer tag https://imgur.com/gallery/OG5QOBl