InventoryMoveItemEvent - the system does not verify the other spaces available

As long as the item that's in the first space doesn't disappear, the system does not verify the other spaces available, bugging all the items in the Item Hopper.
The system which verifies the movement of the item (InventoryMoveItemEvent) can't run and show the other items in the Item Hopper or any inventory.

@EventHandler
public void moveItem(InventoryMoveItemEvent event) {
    itemStack = event.getItem();
    destination = event.getDestination();

    if (destination.getType() == InventoryType.HOPPER) {
        hopper = (Hopper) destination.getLocation().getBlock().getState();
        if(hopper.getCustomName() == null) return;

        String nameHopper = hopper.getCustomName();
        String nameItem = itemStack.getType().getKey().getKey().replaceAll("_"," ").toLowerCase();

        event.setCancelled(true);
        if(nameHopper.equalsIgnoreCase(nameItem)){
            event.setCancelled(false);
        }
    }
}

My github
https://github.com/elderbr/SmartHopper

Start by tracing InventoryMoveItemEvent handling for hopper transfers and reproduce the Item Hopper behavior described in the report. Compare movement across the other available spaces or inventories, and consider the issue complete when the event can process subsequent items instead of remaining blocked by the first space.