I've raced the Group C's and the 964 cup at Suzuka and they consistently crash out (as in - nearly half of the entire grid!) at the the very last of the "S" curves (just before the Dunlop curve). I'm running AI at my usual 105, but it also happens at AI=100.
I have opened a topic a long time ago about the first chicane in Salzburgring. Is there a way to fix the pile ups of AI cars on that track? It happens with every category basically. They always crash there at the start of the race and during the race.