Containers and rubble

Empty containers seem to suck in all the items that they were moved onto, like sinks, crates.
Rubble has simmilar problem, you can't move it, but you can throw in it, or monster can die on it.
Maybe make rubble impassable? And have another, maybe longer way of removing it?
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Start by locating the game logic for moving items onto empty containers and for throwing items or monsters dying on rubble. Reproduce both behaviors and trace the relevant container and rubble interaction paths. Done means the unintended item absorption is resolved and rubble's movement, interaction, and removal behavior matches an agreed design.

Written by the indexing model from the issue text.