How to fix lightmap Density in viewport?

Unreal Engine Rendering
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#1

How to fix lightmap Density in viewport?

the problem with lightmap Density in viewport

this problem come to all my projects and even a new project the the same

See this youtube
((problem with lightmap Density in viewport - Unreal Engine 4 - YouTube))

#2

Need more info - the link doesn’t work.

#3

The link is work you need copy link to browser
and the is another link ((problem with lightmap Density in viewport - Unreal Engine 4 - YouTube))

#4

Apparently is an issue with VR template and stereo instancing:

https://forums.unrealengine.com/development-discussion/rendering/1608678-black-artifacts-displayed-with-lightmap-density-view