E9X M3 DCT question

[AlexGTT]

To anyone with the above, have you experienced a false lauch mode?

I was at a set of lights the other day. In the mood so M button had been on. For me that's traction off, S6, etc. I selected first when the lights turned green and the bastard thing did partial launch without me requesting! Rear axle felt like it wanted to come through the floor as it loaded up and a split second later decided "oh no, you don't want launch control" and all was calm again.

Anyone heard of something like that? My dealer tried to sidestep but I've made them aware I want a full diagnostics check when I get back off holiday in acouple of weeks.