This morning (I'm in Italy), when I was doing a race simulation in a free practice (In free practice you can be alone) in LAN Mode at Silverstone, I started to have this kind of problem, even with traction control set on Full.
To be more precise: The problem of the car spinning out of every corner comes out only after the first spin, before that I can safely drive as I have always done. At the moment I'm having this problem only at Silverstone, and this worries me a lot because this evening I got a league race right on this track