Whenever you are inside an Exocraft in 1st person view, the screen becomes all black and collision for terrain is removed. This results in falling towards the core of a planet. Depending on planet you can fall rather slow or quite fast.
Exiting the Exocraft is not advised, as attempting to force a respawn at the surface may not work. While inside the Exocraft you can switch back to 3rd person view and do a vehicle jump to get back to surface (in most cases). With the Minotaur it is not possible to get a proper view again by switching camera, it remains a black screen.
Each time after having triggered the bug, the shaders are broken for rendering ‘smoke/dust’ properly, instead looking pitch black. A full restart is required to clear the shader cache, while a reload will not suffice.
I have also noticed wheels missing from Roamer and Colossus after triggering the bug.