My new VA4 is having the exact same problems my old one did, where during an hourlong treadmill session, the pace and cadence trackers drop out constantly, usually after about 20-25 minutes or so. I end up getting shorted in my step count. It should be around 9,200 to 9,300 in an hour, but it registers only about 8,600 to 8,700. It's very annoying. Is this a software problem or faulty hardware?