App froze at the airport when needed boarding pass

Do not rely on this app. I had 2 boarding passes loaded. On the way back I could not swipe to the boarding pass for my return trip. The app froze. Closing the app completely and starting again did not solve the problem. I did not have any internet connection. Luckily I had PDF file on my iPad. Scanning machine was small, but one third of my ipad could get in I could scan bar code. With iPad PRO I would have no chance to squeeze it in.

Rob & Roll about easyJet: Travel App, v3.10