PC Wheel rotation resets mid-race

I was running a Formula C race at Monza today when I noticed that my wheel rotation reset DURING THE RACE. I race with the DFGT set and calibrated to 900° so my wheel movement normally is exactly the same I see in the game but suddenly I had to turn the wheel much harder and it only turned about 200° ingame when I made a full 360° rotation. After the race I was able to correctly recalibrate the wheel to 900°

Is that a known problem with this game or might it be a problem at my end?
 
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