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1) Take a delivery mission.
2) Retrieve the box and place it on the grid of your ship
3) Once you arrive at the location where you need to drop off the box, try to retrieve it using option F.

What happened
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Once the crate has been handled once with option F and placed on the grid of its ship, it loses the F marker.
If we place the box outside the ship's grid it works, so the problem is with the ship's grid.

What should have happened
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Regardless of how thebox is handled, it should not lose option F.

Workaround
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To be able to pick up the crate with your hands again, you need to use a Max lift to lift it off the ground and put it back down; it regains option F after this operation.