Step to reproduce：

1. Fill your inventory with 1 stack of stone, 34 stacks and 63 stone slabs in your inventory
2. Put 1 stone in stonecutter's input slot
3. Choose stone slab and use shift + click to quick craft it
4. You only get 1 stone slab, and the another disappeared.

Observed Results:
Only 1 stone slab is crafted.

Expected Results:
1 stone slab goes into player's inventory and other one is thrown into the world, like what crafting table does.