All trucks are destroyed when trying unload and moving pièces of woods thru the barriers to upload on the other side of the passage...
Important BUGS
Yes, after a few hours to try saving all the trucks, i came back to the initial situation ...
I tried to replicate what hapen to you but couldn't( i tried on the new dlc map),i was able to pass log through the post with the crane then cross with my truck then load them up again without a single glitch.
I understand that it's possible but may be not accepted in the game , after a few hours, i arrive to return to the original situation before all these crashes and destroyed trucks in the two différents maps where i test that way...