App does not work

I have a 7-11 right down the road. Get my gas there and buy a coffee every time. Ive had two times of having purchased 6 coffees-once the store employee gave it to me even though it wasnt scanning as I had a free one due, the last time it didnt scan or show I had purchased any, and there was no bar code to scan the one I had to buy! Today I bought another but its not showing on the punch card.

Sneak32 about 7-Eleven: Rewards & Shopping, v1.6.2