Hi,
HR data become innacurate after some.time.of long activity. Restart did results even worse.
Of course, hand cleaned as well as sensor. I tried second hand, but still go hr resulta much lower than reality. Normally 150-155, suddently something changed during activity and FR945 starts showing results like 90 etc.
Im.using climb activity with PulseOx all day.
Can you verify? Issue existed before beta and beta still did not solved my problem.
By long activity I mean 6-8hrs trip.