Yes it is known. I actually found it out myself before other people began reporting it, I had adjusted stuff rather well, but after deleting cbash and shader old files (because PBR tracks didn't look as good as they should) broke looks of this track as it is now.
There are many other problems that if solved would make this mod many times better.
One day, if I'd be as smart, committed and talented as Svictor, who also uses Blender. Then I'd definitely make Goodwood properly in the first place. To be honest, I have been secretly waiting for easy to use and fully functioning way to use Blender for rF2 modding, but it seems it will never happen. So just waiting for a time I'd be able to motivate myself trying to go through the hard way.
I have been spoiled after easy way it was to mod for Assetto Corsa, just preparing fbx source model for special editor program, and then next thing you know you have a track in game. rF2 apparently had same thing on a way, which was called gJed, but it was scraped, probably because it would make rF2 to have too good modding lol
P.S. Goodwood weekend was really great. It would be awesome to have properly made Goodwood with many 50s and 60s race cars in it in rF2...