Furnace not working

When trying to put fuel into a furnace, it won't go it.

What I expected to happen was...:
To be able to select the fuel slot and add coal or remove something from top slot.

What actually happened was...:
Nothing, can't select the fuel spot
Or remove something from top slot
Steps to Reproduce:
1. Tap on the furnace
2. Tap the fuel slot or top slot (they won't respond)