Today I accidentally dropped an item above the cellar and Poof! It disappeared... In fact it is under the cellar "hitbox", so I can't click on it without teleporting down.
Not sure if this is a bug, but there should be a way to see the item you drop above the cellar door.
"The psychological trials of dwellers in the last times will be equal to the physical trials of the martyrs. In order to face these trials we must be living in a different world."