Whenever you use the /kill @e[type=Item] command, and it kills the item, you get something like "item.item.redstone" or "item.tile.blockRedstone". I have a screenshot atttached if you don't know what i mean.
MC-49768
Using /kill @e[type=Item] resulting in a chat bug
Resolved
Invalid
0
Malformed command, you are not specifying a specific type like Arrow or Slime.