I'd say that you dropping so many places in the first instance was accurate with regard to the driver mistake, but clearly there's something wrong with regard to how that has then been turned into a visual for the race at that part of the circuit...I'd say get in touch with Jukka and see what he says, hopefully he can shed some more light on it for you Claudio :)
Those are just the visuals (although really odd) what does the laptime say?
I checked the race and it seems that he was going way to fast the whole lap, so this 25 s mistake made the lap only like 7s slower. Still a bigger mistake but in normal range.
Was that the first lap in rain? Since the actual mistake time is not saved anywhere, it is estimated in the screen based on previous lap time. But if the previous lap time was in dry, the calculated mistake time becomes very long (and you drive the other part of lap too fast). Then also the function which would in normal mistakes just make you slow down in the midde of mistake, slows you down so much that you actually go backwards.