Describe the bug
If you click a crafting result, not shift click, from a crafting upgrade crafting table, it both picks up the item you crafted on your mouse and drops a duplicate stack of crafting results on the ground.

To Reproduce
Steps to reproduce the behavior:

1. Open backpack.
2. Click on 'crafting' tab.
3. Make any valid crafting recipe.
4. Click the output while not holding shift.
5. You have successfully duped items!

Expected behavior
The crafting results stick to your mouse and don't also drop in the world.

Video of the bug in action

Versions
Sophisticated Backpacks 1.16.5-3.15.13.560. Forge 36.2.35

Never mind, found the problem. FastWorkbench Minus Replacement causes this to occur; dupe of #445.