Tried to run a 98 car field at Nordschleife. Classes were: Group 4, Carrera 911 Classic and Touring Classics. Right after the start, the twenty or so first Group 4 cars get away cleanly but the rest are stuck at Tiergarten. Watching the replay, the last cars of the Group 4 grid just blocks the track. They are standing still. The Carrera Classics and the Touring Car Classics are trying to get through but just bump into each other. Restarted the session several times with the same result. Quit, configured a new race with the same result.