Fenix 6X Pro and GPS on Fly

Good evening! The first feeling of use is quite controversial. Previously, when I flew on a plane with a 5x Plus clock, it was possible to see a map and see the speed and altitude. Yesterday I traveled with my new Garmin Fenix 6X Pro, at first everything was good showing speed and elevation, but after a speed of about 300 km / h the GPS signal disappeared and appeared only during landing