I had to create an account cause I have the same exact thing happening to my 08 GP GXP. Only when cold (transmission temps below 70) and only in 1 and 2. No other issue and the car has not be drove hard. I drive mostly highway and only have to stop 3 times for my whole 100 round trip.

I would like to know what you find out as I haven't gotten the car to the dealership yet cause I can't get it to do it all the time. Just keep us posted