Yesterday I noticed that my heart rate many times throughout the day was saying 15 minutes ago or 12 minutes ago or even 22 minutes ago. But it would have no trouble reading my heart rate. This morning, I turned the watch off and back on to try to reset it. The first few readings were 3 minutes ago, 7 minutes ago--all under 10 minutes. But I just checked it and the last reading was 15 minutes ago. Apple Heart Rate page says that it takes your HR every ten minutes. Mine is securely on my wrist. I have just been sitting here working at the computer so I haven't done anything crazy this morning. I know it works because it will detect my heart rate when I open it in Glances and the rate seems accurate. Why is my AW not recording my HR every ten minutes?