Launcher and Editor context / dropdown menus do not display correctly on upcoming Windows 10 build

A few users using the Windows 10 Insider Preview have found that after a certain point in the Prerelease builds, starting at 14915 it seems, the Unreal Editor and Epic Games Launcher context menus have stopped displaying correctly.

Regression?: No
This is not editor version specific and only depends on being on one of these prerelease builds.

A user mentioned that this does not happen when running the editor with OpenGL. Another user found a line of code that can be changed to fix the issue, although I cannot say that this wouldn't break other things.

Inside of: Engine\Source\Runtime\Core\Private\Windows\WindowsWindow.cpp
Commenting out this line fixes the issue:

WindowExStyle |= WS_EX_COMPOSITED;

1. Using a computer that has Windows 10 Pro Insider Preview Build 14936.rs_prerelease.160923-1700, launch the Epic Games Launcher or Unreal Editor
2. Click any option in the editor that would cause a dropdown menu to appear
   Result: With most dropdown menus, the menu will not appear or will only appear after moving your cursor.
   Expected: The menus should appear every time.

Windows 10 Home 15063.332, makes "menus invisible" (again)

Editor right click/drop down menu invisible

UE 4.13.2 doesn't show any menu

UE 4.13.2 doesn't show any menu

All pull-down menus show under UE4 window

When I right click the context menu does not show

Can't left or right click menus

Editor menus open but are not visible

Epic Games Launcher is not displaying

Editor right click/drop down menu invisible