Steps to Reproduce the Bug

1. Install ATM9 Server and profile from Curseforge (Both downloaded March 7, 2024)
2. Gather an item (in survival in world, spawn an item, etc.)
3. Enable cheat mode
4. Drag item to right panel and left click
5. Close inventory, item reappears in inventory

Expected Behavior

Items dragged to the right panel should be deleted on both client and server

Actual Behavior

Item is deleted on client, but server errors out, causing desync that resyncs on inventory close and so item reappears.

Mod Pack URL (Optional)

https://www.curseforge.com/minecraft/modpacks/all-the-mods-9

Mod Pack Version (Optional)

0.2.51

Extra Notes (Optional)

Modpack has trash slot mod to work around for now. The below gist is the latest.log from the Server, if I need to upload the client log as well I can

latest.log

https://gist.github.com/westriel/dfe20a909039d5a9f0ec9d8a16480569