If anyone here is familiar with Di2, I could use some help. I have had my bike for about 4 months now and I LOVE it however, if I am in the big ring and come to a stop as soon as I start to pedal again the chain drops down to the small ring. I have taken it in to the lbs and they have done all the adjustments. They can't replicate it on the stand. I guess my question is, is this something I am causing or is it the equipment? I had 105 before and rarely dropped my chain. The bike store has only sold 3 Di2 equipped bikes, so they are new to this as well and they have tried to help. I would say this happens about 75% of the time. Any ideas?