This has to be my strangest experience so far and I hope it sheds some new light. It's slightly different than the other vehicles experiences where they make a sudden jumps into space after exiting the front seat. This bug happens after I got back and, thus also resulting in a save file that repeats the result. I did some good traveling with this one just before putting a shelter on it thinking I would use in a new area a few beacons away. It also has a solar panel, storage and battery attached. At some point in the video you'll also see that after a certain distance, the truck will stop moving and only continue when I get closer or move towards it.
Here's video:
Save file: https://www.dropbox.com/s/024cnvxbm3vsogz/SaveGames.rar?dl=0
Intel Core i7-4770KGeForce GTX 980
WIndows 10