I started out with 1600 yard goal equipped with the monitor chest strap. I would periodically check my progress. on my last flip turn it showed 1600 yards. I reached the end to hit stop and save my time but it just showed the logo like it reset on its own. I checked my activity and shows it auto saved at 1375 yards. does this have a time out feature or a battery conserve mode that cancelled out my tracking? quite frustrating