THANK you, for me it works now.
I used: repair and refuel → crash
now I use: add fuel (which adds 25%) → works
However, Refueling in the hangar does not work. I always start wirth the same amount of fuel which is unbalanced and roughly <50%.
How ever, the crashg issue is solved.
EDIT: with Update 1.2.7.0 the refueling works as intended in the game.
(no need for manual refueling anymore).