PlayerInventoryAddEvent.setCancelled() has a small bug when adding more than one stacks

This is the code I am using:

@EventMethod
public void onItemPickUp(PlayerInventoryAddEvent event){
    Player player = event.getPlayer();
    Item item = event.getItem();
    if (item.getName().equals("tnt")){
        event.setCancelled(true);
        player.sendTextMessage(item.getName() + " removed!");
    }
}

Now to explain:
1) When I try to pick up items from the ground (F key) I cannot as expected.
2) When I spawn items through the console if I spawn 1 stack or less of items (e.g. 8 for tnt) they do not appear in my inventory
3) When I spawn say 9 items (which is more than 1 stack for tnt), 8 of them appear in my inventory while the 9th does not. Same happens if I craft 9+ items in the crafting bench.

Hope it is not that hard for you to patch with the next update @red51 we all know how busy you are trying to get the player model update to us as soon as possible