Yesterday evening I raced in the gold server of the ranked enduro in a 911RSR. During the race obviously I was lapped a few times by the Audi R18s, all of those cars appeared normal apart from one which was almost totally invisible. The only reason I knew it was there was because Crew Chief warned of faster car approaching & notified when it was alongside. After it passed all that was visible was a very small part of the fin running back from the roof. Afterwards I watched the replay & the car shows up fine in that to start with but after about 10 minutes the front bodywork of the car suddenly vanishes, never to reappear. I also noticed on a couple of occasions other cars drove straight through this car as they may also not have been able to see it, whilst others clearly made room for it. Is this some sort of bug or is there an explanation for it?