I recently did my first long haul flight on the training server from Bangkok to Frankfurt on the Thai A350. As I was on final approach into Frankfurt, my app crashed but I still earned the flight hours. I use an IPhone 8. Like my screen just quickly went dark and I was back on the home screen for apple. I then went back to the app but found I had still earned hours.
What Can I do to avoid this the next time I fly long haul and is there a specific setting?