Just went to pick up a McMuffin on the way to work and was told (after checking out on the app) that the ordering system is down nationwide and I will have to order again.
Of course the teen at the window couldn't give any more information but;
- I assume that the original order will be refunded
- Expect extra deals due to failure based on response to previous failures.
You're only charged when you arrive at the store to collect it, not when you checkout.
I doubt they'd create a new deal just for the failure. Their whole app is a failure.