Over 1000 miles on my di2 expert. No issue so far. I know a few other guys in my area that have roubaix's with no issue with the FS either. I do think just like any machine there are always a few lemons. I will say I have a couple shoulder/neck issues from lifting heavy and some mountain bike accidents when I was younger. The FS makes a huge difference in comfort for me. I also have a GT Grade Ultegra and an old Scott CR1. The comfort of this bike from those especially on a century has been worth every penny and the FS has been a game changer on longer rides for me. To each their own. My two cents is that doesn't appear to be a wide spread problem and I would go for a warranty issue for a replacement, if that's even an option for you. Good luck