I've encountered a strange bug on my square store:
If a customer browses an item they are presented with an Apple Pay button on the Item page - for a instant checkout. They click/tap the Apple Pay button, authenticate on their Apple device and it appears the transaction has completed but it has not.
Subsequently they can confirm in their Apple Wallet that the transaction was not processed.
However, if they add the item to the cart, proceed to review the cart and then choose Apple Pay during checkout it all works fine.
Any ideas what's going on?
