First of all, english is not my native language so maybe i'll have some errors writing this.... sorry
While i was traveling through the map i got stuck randomly, but just for a moment. i thought it was some kind of weird lag, but the last time i got stuck while i was creating a road with a rake and lasted long that way.
I pressed F2 and i could move in flying mode but when i disable it i got stuck in the air,and when i tried to get back to menu the game crashes.