Stonecutters creating nothing

Stonecutters get rid of stonebrick slabs

What I expected to happen was...:
Shift clicking on the stone cutter should give me my two stacks of stone brick slabs from my stone blocks

What actually happened was...:
The stone blocks were used but no stone brick slabs were produced

Steps to Reproduce:
1. Put in the stack of stone blocks into a stonecutter input
2. click the stone brick slab option
3. Shift click the output to quickly get the slabs into your inventory

4. No slabs