Put the summary of the bug you're having here

What I expected to happen was...:
Describe what you thought should happen here
To put coal in the furnace and smelt iron
What actually happened was...:
Describe what happened here
I put the iron in but couldn't put the coal in and tapped on the iron but it didn't go to my inventory
Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...put the iron on the top
3. ...put coal on bottom