Windows player in full screen mode is brighther than in windowed mode

When Player Settings > Deferred Linear: The colors are brigther and the resolution looks stretched when in Full Screen mode (Works fine when DX11 is disabled)

To reproduce:
- Open attached project and launch "test" scene
- Make sure that the Rendering Path is set to "Deferred" and that Color Space is set to "Linear"
- Build & Run a windows standalone player
- When the Windows FullScreen Configuration window pops up, make sure that the Graphics Quality is set to "Fantastic" or "Beautiful"
- Run the player in windowed mode
- Press ALT+ENTER to change to fullscreen mode
- Observe that the background color has a much brighter color