Following the steps above will result in the resizing cursor not appearing properly for stand-alone game windows. The resizing cursor will appear to flash very quickly and then go back to the regular mouse pointer.
Results: The resizing cursor will flicker in and out very quickly and then stay on the pointer cursor.
Expected: When entering the resize boundaries of a window, it is expected that the resize mouse cursor should be constantly visible
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-80522 in the post.