I’m aware of the lens flare issue. However, lens flare has always been disabled. When I toggle it on then off it goes away in Forge. When I render the lighting again it looks perfect. After I save the map and load it into a custom game. The flare will be present once again. I’ve come to the conclusion it’s a bug that needs to be addressed. I’m sorry for the inconvenience, if any.
Note: The video was labeled incorrectly on my part. I take responsibility for labeling the map a “remake” when it was designed around the mobility of Halo 5. My take on Lockout from Halo 2 is simply a re-imagined and up-scaled version. My apologies!