Maybe this is not really a bug, but rather an annoying feature:
If you plant a tree, then accidentally drop an item (say a sprouted tree in a tree pot), the item will land in the same tile as the tree, and you cannot access it to pick it up again bye bye, tree pot, I'll miss you
"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."