My situation was different from yours, but adding a data point for what it's worth in case it helps anyone else -- I forget if it was this past Saturday or the one before, but I had a reservation with DL-DL outbound, AF-AF return but DL-marketed, and the outbound had changes to the schedule. If I tried to view that trip in the app it would crash immediately. Viewing any other trip was fine. I looked at the trip on the website, accepted the change figuring that was screwing up the app, but the app still crashed for maybe another 15 minutes after that but it was eventually able to view the changed trip.

So, for anyone experiencing crashes with one specific trip, check on the website to see if it has schedule changes...