Ok. For my third round playing, then in the mission of rescue Nick Rye's plane, I flew very low according to the path, but I accidentally went down in a tree twice.
The first time, no problem, just give extra throttle, roll and and gear up.

Now it is not even possible to do this, but even worse, I can not even get out of that plane, so I'm stuck inside a plane in a tree crown.
I can't even kill myself to respawn.
The only way out is to quit the the game and start all over that mission.
It's a matter of fact, I even did this again on purpose, just repeated it and yes, the same thing.

Instead, one should be killed immediately once one hit the ground or the water, and thereafter respawn at the beginning of the mission.
Yes I have even been able to fly nearly submerged into the river on this mission.

Best Regards from Sweden