I got a Charge 6 a few weeks ago to replace my old Versa 3, whose battery finally crapped out. And since I've had the Charge, I've noticed that it occasionally loses its dang mind when it comes to my HR readings, usually on the too-high side. This morning, while sitting on the couch, I caught it saying my HR was ~145 when I did not feel that at all. (If my HR were that high, I'd be a puddle of sweat for a start.) A manual check proved my HR was in the mid 70s, normal rhythm, but my Fitbit insisted I had a super-high heart rate for a few minutes longer. I've also caught it in the past saying my HR was 48(!), but I was checking my blood pressure at the time and the BP cuff said nope...high 70s.
