Not true stop saying that to people. If ticket is recently bought and hasn't printed it will not scan. Just wait a bit more and if it doesn't TO will sort it.
There's two issues. If it's a late buy and showing as not printed then yes it probably won't work. I think it still being not printed at the point of kick off is pretty rare though.
But your membership nfc pass
is just a membership card. Whatever game is showing on that is ultimately irrelevant. Trying to refresh or redownload is pointless and I guess there's a risk it gets stuck not being on your phone and then you've got a trip to the ticket office for no reason.