I think that this is due to low resources. I think that the game does this
to lighten the load on resources when low. My Logitech Formula Force does
the same, so I don't think it has anything to do with your MS SW USB.
I find that this problem only pops up whilst racing online.
Some have found that reducing the FF effects to Low in the Menu, solves this
problem. Also, make sure you haven't got the graphic demands in the Menus
set too high for your particular machine.
This is all only theory.....please correct me if I'm wrong Guys.