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1) Spawn a Caterpillar
2) Open a cargo door, so it is deployed to the ground
3) Place an cargo item on the door
4) Close the door
5) The Cargo door doesn't have a intermediary elevated position
6) There is collision with the cargo on the elavating cargo door, breaking the door
7) This renders the Cargo doors non functional for cargo loading from the ground level.

What happened
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Cargo door, although able to lower to the ground, cannot be placed in elevated position, and doesn't facilitate moving cargo to the grid, without collision on closing and rendering the door into broken state. The cargo functionality by lowering the doors is therefor unusable.

What should have happened
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There should be an intermediary position facilitating moving the cargo from the doors to the cargo grid.

Workaround
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Moving cargo with tractor beam directly to cargo grid.