I've broked the furnace while it was cooking some iron, and this happend. screenshot

The furnace is NOT working anymore. I've tried to place it down more times, and it looks like if you broke the furnace while his fuel isn't completly consumed it bugs out and never goes back to his own state.

Everything goes back to normal when you stack up the furnace with another one.

Steps to Reproduce:
1. Place down a furnace
2. Put some fuel and something for it to cook.
3. Break the furnace while it's cooking and place it back down.