Originally Posted by
mconlonx
Could be the high limit screw on the FD is a bit too tight. Also could be the lateral alignment is not set up correctly.
If this happens when you start from a start, I'd assume that you are in the lower gears/larger cogs out back at the time. That crosschain type of situation could cause it, if you backpedal at all in one of the lower gears -- FD will auto-trim toward the inside, facillitating the unwanted downshift.
Could also be Shimano trying to retrain you with your shifting. When approaching a stop, instead of shifting into a lower gear out back, consider shifting into the small ring up front...
I think this is it! I figured it was operator error
When it would drop, I was in the larger cogs (usually the second or third one down). If I am in the middle of the cassette it does not drop. Thanks for your help, I appreciate it.