So I got myself a series 3 SS model and I've been trying out the workout function but seem to be getting strange heart rate monitoring results. During a workout I would look down at the watch and a couple times during the workout the heart rate monitor would be grayed out as if it completely lost detection of the HR. It would drop down to a resting ish heart rate of 64. Then it would eventually come back. I thought it might be because I swiped over to change to another song but that just doesn't feel right. Has anyone else experienced something like this?