Unfortunately Laurent I am far to old for this thing, my reaction are way off,
but i am intrigued by it.
I was fascinated by Joseph spin, and had a thought it was the aero, but that was incorrect.
It happened a lot with me until i dialled out the front wing and after looking into i can see the problem.
Eventually i moved the brake bias more to the front and took a lot of wing out of the front.
Because I run it low on the front, i was at end of the DRS zone running a lot of uneven downforce on the front and with my brake balance to much to the rear the car was copying Joseph spin.
I was at front 12 and rear 8, yes I noticed your wing configuration when i was behind you in Qualifying.
i still cannot see the reason for joseph spin but maybe a rear tyre locked, that is my best shot at the reason. Joseph certainly did nothing wrong. but he is very heavily on the brake on corner entry.
i find the more difficult a car is for me the more i am interested in it but not so keen to race it.