Lumen reflection distortion

Lumen reflections appear distorted depending on the camera orientation.

1. Download the sample project named LumenTest (see Additional Info URL)
2. Open the MirrorMap level
3. Rotate the camera in the main viewport

Expected
The cube reflection doesn't change color as the camera view is rotated

Actual
The cube reflection color changes depending on the rotation angle.   

If the reflection method is changed in Project Settings to Standalone Raytraced the cube color does not change and behaves as expected.