I have noticed that my heart rate registers normally during regular day to day activity but reads abnormally high during exercise. So for example it can go from 50-60 to 175 within 2 minutes when I start a run. When I check this against the monitor on a treadmill it should read about 130-140. It seems to me that this problem has arisen or at least become more acute after the software update. Is anyone else seeing this issue?