Suppose you want to buy a lot of crates, generally someone would want to spam a button to be able to do so. Queue that action, then the purchase confirmation menu will stretch with consecutive taps, up to around the tenth tap or so, at which point it will cover up the button you were intending to tap and it will close the menu as would normally be intended. Very low priority, as it can be circumvented by not spam-tapping, but it exists nonetheless.