[SPIGOT-6346] InventoryClickEvent setCancelled(true) results in duping the item Created: 07/Feb/21  Updated: 09/Feb/21

Status: Open
Project: Spigot
Component/s: None
Affects Version/s: None
Fix Version/s: None

Type: Bug Priority: Minor
Reporter: NooTChhYT Assignee: Unassigned
Resolution: Unresolved Votes: 0
Labels: Spigot, event
Environment:

Windows 10 Pro

Java 8

CraftBukkit version git-Spigot-138d451-e5cb519 (MC: 1.16.5) (Implementing API version 1.16.5-R0.1-SNAPSHOT)

Version: 1.16.x
Guidelines Read: Yes

 Description   

I'm creating a custom potions plugin.

I have a potion with custom model data that if you consume, it sends a packet to all players (PacketPlayOutEntityEquipment, helmet to dragon head).

First, if you take it off, it should disappear, because it's not supposed to be in the inventory, it's just a packet. However, the player is able to take it off, it doesn't disappear (probably an NMS bug).

The Spigot bug is: when the InventoryClickEvent gets canceled, it dupes the item (stays in the slot, but gets added to the cursor). This only happens in creative mode.

 Comments   
Comment by NooTChhYT [ 09/Feb/21 ]

Thanks for the feedback.

I don't know much about the client side, but if @md_5 says something, that's probably correct 

Comment by md_5 [ 08/Feb/21 ]

> This only happens in creative mode.

Probably can't be fixed then, creative mode is client authoritative.

Comment by NooTChhYT [ 07/Feb/21 ]

In survival mode, the dragon head gets removed, and the dupe doesn't occur.

The server is running CraftBukkit version git-Spigot-138d451-e5cb519 (MC: 1.16.5) (Implementing API version 1.16.5-R0.1-SNAPSHOT)

Comment by Black Hole [ 07/Feb/21 ]

Please provide the output of the /version command.

Please test that it happens in survival game mode, too.

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