Hi,
Every now and then I have the problem that my flight plan and waypoints are deleted as soon as I take off.
I recorded a video about it... You have to look at the navigation display... where you can still see the route... and then suddenly it disappears.
I've had this problem a few times with Fenix... That's why I copy my flight plan in Sec FLP before the flight...
But this is annoying and I don't understand why the problem still exists despite updates.