Download licensee test project from here - [Link Removed]
(Note - It is a simple VR template project but does not require VR to test this particular issue.)
Move the camera inside the door to the darker area. Rebuild lighting (GPU lightmass), the room should darken with glowing light effects. Save All.
Reopen VRTemplateMap, the static lighting will be lost.
(see the UDN for further details + screenshots).
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-171907 in the post.