Hello, I have an IPad Pro which is perfectly capable of running at high graphics, and recently I have been experiencing the same thing. For example, the other day I took off from Tokyo intl for a long-haul flight, having RESTARTED the IPad beforehand to have a fresh start, and yet as I descend and come onto approach for Chicago intl, the app CRASHES!
So, I thought this would be a one-off, and took off again that evening for another long-haul flight from Incheon to Auckland. I make sure it reaches cruising altitude with no problems as usual, and then make my way to bed. When I get up, ready to land the Boeing 747-8, I come downstairs to a blank home screen. It had crashed AGAIN!
I am starting to get quite frustrated :(