holding an item with cursor, with inventory open, in creative, makes the item dissapear when u close the inventory, instead of dropping or adding it back into inventory

is it supposed to be like this..?
i thought the item would drop if i was holding it with cursor after exiting inventory, but it deleted the item. i was very upset that i accidentally lost one of my players items. but at least i was able to recreate the item and give it to him..