After tons of research and having the same problem, the conclusion for me is lack of traction. Better tires are said to resolve the issue. This is what I was told:
Too high launch for the tires/traction you have.Tires spin in first, shortshifts into 2nd, clutches grip because of gear change, and clutches overheat.
Too high launch for the tires/traction you have.Tires spin in first, shortshifts into 2nd, clutches grip because of gear change, and clutches overheat.