Copying items in Realms with Dispenser or Dropper

Using a redstone pulse and a Dispenser or a Dropper can copy any items manually.

Just before the Dispenser or Dropper shoots out one item, pick up that item, there will be one item in the hand, but the other one item will be shot out normally because of the network delay. And then we have two items!!!

There should be a SERVER CHECK when dispenser and dropper shoots out an item, but there is not. This bug will lead to a fatal trouble that players will lose motivation of collecting assets and then leave the game!

Please fix this bug ASAP.