We had a GT3 race last Tuesday (80 Mins). During the race someone killed the 5 and 4 sign for turn 1. So far no bug only bad driving skills. But these 2 sings were only gone for some drivers on the server. For some, luckily me inculding, the signs were still present. You can also see it in this video stream (not me). The 2 guys are in the same channel and talking. The guy who isn't driving, which is in front of them, is telling his mate that someone killed the mentioned signs. You can clearly see that the signs are present for the streamer. Video at arround 50:00 mins