I was in the Tatuus F4 on Mid Ohio. 40 minute race with mandatory pit stop. In the last few laps I went from 14th to 1st because all the AI pitted again. On the last lap, I was in 4th headed for the finish line and the three cars ahead of me all pitted. I had the same issue with the formula JR a while back. Maybe the same bug with the tires.