Scene Capture 2D not updating capture size when played in fullscreen mode

The Displayed Render Target Textures are not accurately resizing when the Game is played in Fullscreen mode.

[Link Removed]

Also tested in Promotable-CL-2455917

1. Open BlueprintOffice Project
2. Play as Standalone Game
3. Move to the right back camera control space
4. While watching the Scene Capture's of the cameras, enable fullscreen mode (Alt-Enter or console command 'fullscreen')

RESULTS: Scene Captures are stretched oddly when in Fullscreen mode

EXPECTED: No difference between Fullscreen and Windowed mode.