Video of the error linked above.
basically as the title says. i’ve set up a simple wheeled vehicle with two long wheels, not changed any physics assets, just using simple set drive, set steer, set brake controls. without pressing any buttons, as soon as the wheels collide with the floor the vehicle disappears, the output log says that it’s left the level boundary (so i assume it might be a physics thing) but can not for the life of me figure out what i’ve bungled. any help appreciated, i’ll try to get back to any questions asap. i just hope i’ve been stupid with a single little option and not somehow gotten every part of the set up catastrophically wrong.