1 gear not in adjustment
I have a new bike (900 miles) with 105 10-speed shifters, a compact double in front and an ultegra rear derailer. A few rides ago, my chain would come off after going from the small to large front chainrings. I adjusted the front drailer and all is fine, until this mornings ride. I noticed the bike seems to skip a gear going trying to go into the 3rd largest gear in the rear. All the other gears seem to be fine and I am not noticing any new noises. I am new to STI, any suggestions on how to proceed?