I got the update notification for minecraft and i got it. I tried to yse the furnace and it didnt let me

What I expected to happen was...:
I think you should fix that bug

What actually happened was...:
Describe what happened here

Steps to Reproduce:
1. Get on survival mode
2. ...try to burn something or produce like iron
3. ...you cant put anything on the second slot to burn like coal or wood it happened after i got the 0.7.0 update