GregTech CEu Version

v2.8.10

Modpack Used

No response

Addons Installed

No response

Environment

Singleplayer

New Worlds

Yes

Cross-Mod Interaction

No

Expected Behavior

Expected: No duplication.

Actual Behavior

Keep repeating the operation, and the soft mallet will duplicate.
Some times the duplicated soft mallet will disappear (similar to duplication that is only visual effects), but most of the time the soft mallet actually duped (as I reloaded the world here).

Steps to Reproduce

1. Obtain two soft mallets with the same material, but different durability.
2. Open any crafting menu.
3. Place the two soft mallets on the menu.
4. Pick up one of them, swap with the other by clicking on it, then place it at another empty space. Keep repeating this until the mallet is duplicated.
5. Exit the crafting menu.

Note that it is not necessary to do the exact operations listed in step 4. The only thing that matters is that the soft mallet is moved around the crafting menu. However, this is a reliable way to trigger it.

2024-12-29_20-02-25.mp4

Additional Information

Originally from SymmetricDevs/Supersymmetry#1047.
I have tested on different materials and the same on hard hammers. Neither of them work (or at least the bug cannot be triggered easily).