Keybinding Doesnt work

Put the summary of the bug you're having here

What I expected to happen was...:
Describe what you thought should happen here

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

Steps to Reproduce:
1.  Go to options then controls
2.  scroll to open/close inventory
3. change the key to tab

4. Then press done go back to the game and you can open but no close inventory.