I would like to help but I cannot provide you with any video of this happening as I have no way of recording it nor a way to upload it to you.
Here is some screenshots, In the first screenshot the hover vessel has sunk into the ditch you see around the base. In the second screenshot, you see that the yellow hover vessel is flung into the air. You can also see through the scope with night vision goggles that the stairs that is mostly submerged into dirt, is clearly visible if I am far away looking into the scope. This is only happening to vessels not docked and this is why we need docking for capitol vessels. If i park it so it docks to the base, this doesn't happen so it is probably the rendering of the landscape combined with the gravity.
