Set user focus for player 0 will cause other local players to lose input

When the player at index 0 sets its user focus it will cause other players to lose input. This does not occur when setting the user focus of players with an index higher than 0.

1. Download the attached project
2. Open the project
3. Plug in an Xbox controller (make sure the controller reads that it is player two) (something to control player 2)
4. Play in Editor
5. Move player 1 using the W,A,S,D keys
6. Move player 2 using the controller
7. Press the 1 key (this will set user focus to Player index 0's UI)
8. Move Player 2

Result: Player 2 will have lost input control
Expected: The input for player two would not be affect by setting the user focus of player 1