It's happened twice now. 2011 Superfly with full X0 kit. It seems to call off during downhills in the big ring while coasting. I notice it's off after I start pedaling again. After the first time I tightened up the front limits so that it's slightly rubbing at small-small and big-big. I also lowered the direct mount FD so that it's about 1.5 mm away from the big ring vs the 3mm it was before. Any other thoughts? It certainly doesn't seem normal.