This update makes the item spawners reuse the item they have already spawned to dramatically reduce the network cost of spawning in a different item.

Go to the BP_MasterItemSpawner and then to the Spawn Loot function. Then delete the highlighted nodes shown in the image.

and connect the beginning node up like the image below.

Next go to the BP_MasterItem and create the custom event shown in the image and connect it up like in the image below.

Next back in the BP_MasterItemSpawner in the Spawn Loot function add the highlighted node shown in the image below.

If you do not know how to get the pins on the item and selected item nodes follow the video below.