Hmm ok, that makes sense. I know the last 4 are different because the digital card in Apple Pay gets a new 16 digit card number, so that part is definitely right. I'm glad to hear of someone else getting a different expiration date exactly three years past their actual date, as that was what my situation was.
As I mentioned, we stopped the transaction because we didn't know if that would be an issue, but it could have gone through. I should have my new CC tonight, so I'll register it with Apple Pay and perhaps go back to a different merchant to see if it now works. I also restored my phone yesterday as brand new to rule out any software bugs.
I can't figure out why you would stop the transaction. Why not just let it go through and see what happens?
Pay partner. It should work there. The EX date is not one of the tokenized items, if it was wrong -that is a problem and would prevent the card from working.