Not usual for Ucci to do these kind of mistakes. I've seen the onboard, it was a slight left before the hairpin in the right. Not an easy section because after the left turn you have the car balanced to turn left but if you are an experienced and winning driver like Paolo you know what to do.
I think it happened because he already won this year and the concentration can't be the same but also because manufacturer title was not yet sure even if it was enough for one between him and Tassone to stay in the top7 or 8. Anyway when the goal is too much easy it can bring you to drive with the fear to make something stupid, and this is when it actually happens.
Or maybe these are just too much words and he made just a mistake.