Lumen tile classification flicker

While we suggest using screenpercentage at 25%, it is visible at higher percentages.

Video showing the flickering:
https://udn.unrealengine.com/s/contentdocument/0694z00000Qw4jPAAR

1. Download licensee repo, open.
   (https://udn.unrealengine.com/s/contentdocument/0694z00000Qw4mcAAB)
2. Execute following console command:
   BugItGo 713.477134 121.762739 426.206988 -16.042047 155.035537 0.000000
3. Change the screen percentage slider to as low as it goes (25)
4. Observe slight flickering on the bottom face of the cube