Put the summary of the bug you're having here

What I expected to happen was...:
The recipe would preview and then when I leave the furnace it would go back to what is smelting

What actually happened was...:
The items in the furnace all went back into my inventory even if it was in the middle of smelting, only the last item as the flame was left and it continued buring while the preview was up.

Steps to Reproduce:
1. Put 3 planks and 3 logs into a furnace
2. Click on a recipe that is unavailable to use because you do not have the resources
3. Try to get the items to continue cooking without having to put them back in