Is it different brands front and rear?
I had some Bridgestone's up front and then I put 2 NEW Pirelli's at the back. Same issue. DSC coming on for nothing. I put the Pirelli's on the front and moved the Bridgestone's to the back. Problems are over. To this day I still dont know why this happened, but the DSC is not coming on no more
I don't have a solution, but I admire the problem.