Have the latest Di2 on my new bike. I have Zipp Vukas, and should be able to shift on the horns and at the aero bar extensions. Love that feature! Well, went for a ride yesterday and the shifting works great on the horns, but NOTHING on the aero bar extensions. No Bueno. I check the 5 little plugs and they all seemed to be plugged in solid. Any ideas on what might be wrong before I bring it to the LBS?
Connect to etubes with your charger, and see if the system recognises all shifters?
…and if it does, check for updates. Each component has firmware that can be updated.