I was driving some fun races on Westhill when I suddenly saw this

Could be some GPU issue. Wondering if it has something to do that windows of his car have no reflections.
Have you mpr? Probably will look normal for others,I believe.

mpr is gone now, because they started a new race on the server

But you may be right and it could be only a problem by myself. Will have to see if this problem returns in the upcoming races.