I have run into a very odd issue, during normal gameplay on a hardcore map of Mount Logmore, initially found when loading a filled fuel trailer onto a flatbed to take to the other garage. The fuel semi-trailer when filled with any amount of fuel will flip to a vertical position when in a normal upright position and stay there until pulled down or rolled over. The amount of fuel directly affects the speed at which it flips, the more fuel, the faster it flips.

The only applicable file I can think of is the save in which it is contained for testing.