[Windows 10] Hitting the Windows key while in fullscreen summons an invisible but still interactive Start menu

On Windows 10, pressing the Windows key in a fullscreen UE4 application summons the Start menu beneath the application. However, the Start menu still receives input, which can cause applications to accidentally be launched. It would be preferable for the start menu to either minimize the UE4 application or convert it to Windowed mode before summoning the Start menu.

1. Launch a UE4 application in exclusive fullscreen (not borderless windowed) on a Windows 10 machine
2. Press the Windows key. Note that the Start menu does not appear
3. Click where the Start menu should be, and observe that it will receive input and launch whatever application was clicked