Cannot move forwards after changing key binds

You cannot move forwards after you do the following:

1. Press "Esc" on your keyboard to go to the game menu
2. Press "Options..."
3. Press "Controls..."
4. Press "Key Binds..."
5. Press the button to the right of "Walk Forwards", usually "W"
6. Press "Esc"
7. Press "Esc" 3 more times to go back to the game

You will notice that you cannot move forwards anymore.