I had an issue with the app on Saturday night ORD-ATL-CLE. The first leg departure was delayed by 23 minutes, but we arrived at ATL about 80 minutes prior to scheduled departure of the second leg. Nonetheless, the warning that my first flight was delayed stayed with my Iphone and wouldn't let me access the BP for ATL-CLE. Fortunately, the nice GA at Gate B18 got me sorted out. This problem has been going on for a while, and I don't understand the logic in it.