nothing like that on my install !
M65 doesnt work very well with the 60fps patch. But the only great issue is the top speed limit (only 180 km/h). Is the top speed normal on your install ?
What are the ai laptimes in practice and race at laguna ?
Could you send me your gplc65.exe ?
And afterwards, try that : delete your gplc65.exe and let gem rebuild it...
Haven't checked AI top speed. Haven't fired up GPL in several days so working from memory, but in practice/qualifying at Laguna (Monterey Historics, not Laguna67) with the 65 F1 mod I run about 1:40, the best AI about 1:37 (I typically qualify 5th-8th); in the race I will lap the field in a twelve lap race ...a note scrawled on an envelope lists "Laguna AI practice 1:37, AI race 1:59". Without the 60fps patch AI race performance is consistent with practice times and I will finish mid-pack. The exe has been rebuilt several times as I tried different 60fps patches and played with FOV.
Had similar results at Pebble Beach and Spa.