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1) Spawn a Constellation Andromeda
2) Load boxes of any kind - Stor*All, Commodity, etc
3) Note that two boxes can't be placed next to eachother

What happened
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The attached boxes become locked to the Constellation Andromeda cargo grid, with tractor tools refusing to remove them, noting either 'Volume Exceeded' or 'Item too heavy to move'

What should have happened
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The attached cargo should be just as easy to detach again

Workaround
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Storing and then retrieving the ship again seems to release the boxes, making them movable again