hi there, sorry for my bad grammar, but I'll try to explain it in English. I have created a GTR-3 Challenge (8 races, 30 minutes, KI 95, damage, flags etc. on). During the first two races - Zolder and Hockenheim - I started from the back (Pos. 20 and 22). Duri9ng the race I could overtake only 2 oder 3 cars. After about 15. minutes of racing some opponents started to do their pit-stop (changing tires). So I could move to pos. 6 or 7 before my own pitstop. One or two laps later I've been pitting too. After that I came back in pos. 15 or 16. But suddenly some other opponents obviously pitted again, so I moved to pos. 4 or 5 and finally finished in 5th position. But that's not the real performance. Only because some cars have pitted two times within a few laps I colud move in such a good position.
A similar issue was detected and has been reported as fixed in one of our internal builds, it should be included in the next update if it passes QA. This was in a series with mandatory pit stops though, so not sure if it is the exact same issue.