Put the summary of the bug you're having here

What I expected to happen was to open the furnace and a create an object...:

What actually happened was I was able to open the furnace, but the box for adding fuel is frozen. I cannot add fuel. I can add ingredients to the top box, but nothing is created ...:

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...Click the furnace
3. ...Boxes for adding ingredients are locked (frozen) up