Mouse is confined to the viewport when using a break point on an event

Mouse is confined to as area the size of the viewport when using a break point on an event.

1. Open the first person template
2. Open the first person character blueprint
3. Place a break point on begin play
4. Save and compile
5. Make sure that the viewport and the First person character blueprint share a window
6. Play in editor
7. Notice that the mouse is confined to a space the size of the viewport

Expected: The mouse would be free to move around after the break is hit
Result: The mouse is confined to an area that is the size of the viewport