news of the day: I lifted the car up to check the heights and the alignments and came out that the car is too low on the front, much lower than the minimum admitted value according to the tyre-shop documentation. This is also visible looking at the car and comparing with pics of the Granturismo I find online: my car is noticeable too low compared to the back, so for sure there's something wrong in the front springs.
Now I wonder if this could also affect the electronic suspension functioning, becasue the suspension ecu is working with wrong parameters and give bad inputs to the shocks...