Game-Breaking Bug in ExtendHopper

[lycaste-works]

Minecraft Version : 1.20.1

Mohist Version : Build 915

Operating System : Unknown (Rental Server)

• Verified on Ubuntu 24.04 (locally tested).

Concerned mod / plugin : ExtendHopper 0.2.1
https://www.spigotmc.org/resources/extendhopper.112523/

Steps to Reproduce :

1. Build a simple filtering system:
   Chest A -> Hopper A -> Lightning Rod -> Hopper B -> Chest B.

2. Attach an item frame to Hopper B and place the item to be filtered into the item frame.

3. Attach a sign to Hopper A and write "routing_debugger" on it.

4. Right-click Hopper A to open the routing_debugger GUI.

5. After this, every time you click on any item in your inventory, the routing_debugger GUI opens.

Description of issue :
Expected Behavior:

• The routing_debugger GUI should only open when interacting with the designated hopper.
• It should not interfere with normal inventory interactions.

Actual Behavior:

• After opening the routing_debugger GUI once, clicking on any item in the player's inventory always triggers the GUI to reopen.
• This makes normal gameplay difficult.

Troubleshooting Steps Taken:

• Reloaded the plugin.
• Restarted the server.
• Uninstalled and reinstalled the plugin.

Despite these efforts, the issue persists, and normal gameplay remains impossible.

Additional Notes:

• This issue started occurring with a recent build.

Additional Investigation:
After further investigation, it was found that player data contains tags such as extend_hopper:gui1:x,y,z and extend_hopper:gui9:x,y,z. These tags are presumably meant to be removed, but they remain.

Temporary Workaround:
As a temporary workaround, deleting these tags using tools like NBTExplorer prevents the routing_debugger from opening while interacting with the inventory.