That's interesting. I had the same problem with my 2011 Heritage and recently flushed the master cylinder. What I found when removing the fluid was several black flecks in the reservoir. I carefully removed them and refilled the reservoir with new fluid and flushed a few extra ounces when vacuum bleeding the system. I also have had the weeping around the gasket. I cleaned the gasket thoroughly. I used blue locktite and torqued the cover to 8 inch pounds. So far working like a charm.