version is 2.0.5506 on watch 3.
what happens is on the watch the transaction seems complete, but on the vendor machine the pairing is not happening, nfc is turned on of course.
I managed to make it work once but I don't remember if there has been a software update or not.
Are you trying to use a debit card or credit card in Samsung Pay on your watch? Which bank(like ATB, CIBC, KOHO, RBC etc...) and what type of card(like VISA, Mastercard, Interac etc...) you are using it?