GamePad input commands for multiplayer all send to player 1

When setup for multiplayer, all players are able to move around and control the camera with the analog sticks but button presses of all controllers only affect player 1.

1. Open BP Third Person template
2. Follow the screenshot (setup in MyGame) to setup 4player local multiplayer
3. Run PIE with multiple controllers plugged in
4. Use different controllers to run around and jump