There's a timing glitch regarding the bridge. When you are leading the race, you can sometimes see that other cars suddenly appear to be in front of you in the position bar at the top for a second. This is because they are driving over the bridge in this moment so the game probably thinks they are already on their next lap. At the end of the race, I crossed the finish line when an AI car was driving over the bridge, and that AI car was declared race winner...
It seems there is not only a timing bug, but also a bug with dq and overtaking under yellow. We tried to do a 60 min event at Suzuka West this evening, and during the first laps almost half of the field was disqualified because of overtaking under yellow, and the game don't let the drivers serve there penalties, some were instantly disqualified as they entered the pits.