ApplePay has worked really well generally, but lately a couple of times (at McDonald's) I place the phone on/near the NFC reader, with my finger on the sensor, the phone wakes up, see's that a payment is available, but just sits there saying "hold near reader" or some such. It never authenticates the payment, and if I turn off of the screen and try again, it doesn't bring up the pay dialog. Is there some way to "restart" a payment attempt? I can't find any documentation of this.