I went for a run with my 42 SS ML today and at first the HR seemed responsive and about where I would expect it. After about 5 minutes, the hr colors turned grey, the heart stopped beating and the numbers stopped changing. It remained this way for a while and then several minutes later it showed another really low locked reading. Eventually it sorta worked again. I tried adjusting the watch on my wrist, even tightening it more than it already was and nothing. This seems more like a software glitch imo. Anyone else see this?