The problem with the collision models. (SnowRunner)

Tell all right? When you take the valve to a second machine, crane load the trailer on the second machine, for example bricks, and one has only to sit in the car with the trailer as a whole load of not noticing the trailer falls to the ground.
Same thing with other chips, for example I want on the trawl to move the second car., and the situation is the same, the car went to the trawl, and once sat behind the wheel of the car that will drag the second machine falls to the ground through the trawl.. she has lost a conflict((
P. S. the game in solo mode..