Dock visible in Standalone fullscreen on Mac

If the game is set to show the mouse cursor, moving the cursor to the bottom of the window will bring up the Dock while in fullscreen.

1. Open UE4 Editor (any project)
2. Open Level Blueprint
3. Add BeginPlay and Get Player Controller nodes
4. From Player Controller return value, create Set Show Mouse Cursor node (set to true)
5. Wire BeginPlay into Set Show Mouse Cursor
6. Play in Standalone
7. Use Option+Enter to enter fullscreen mode
8. Drag mouse to the bottom center of the screen

Result:
Dock window appears overtop of the game window

Expected:
Game window takes priority over other windows when in fullscreen mode

Cursor and OSX desktop in standalone fullscreen