If we set the checkbox in the "Simple Object" attribute for vehicle (cars, trucks) or armored vehicle (tanks, APCs), then after starting the mission we will see that this vehicle has moved down a few centimeters
This does not happen if we disable only simulation in the attribute (will be in the same position as we set)
I've noticed that this doesn't happen with:
- Helicopters
- Props
Check YT video for visual steps to repro