Using a Vivosmart 4.
I am continuously experiencing what is basically the same failure mode. I have attached the graph (from my Garmin Connect account).
As you can see from about the 8 minute mark, lasting for about 2-1/2 minutes, the pulse reading drops to nearly resting heart rate - which is ridiculous, because, at this point in the workout my pulse was climbing quite quickly, and could never have dropped below 110, and certainly not down to 60.
This happens fairly consistently - not necessarily at the some relative time in the workout. I have adjusted the tightness and ensured the inside of the watch is clean before use (wiped down with a clean, damp cloth).
The fact that this happens so consistently - every use - is an annoyance, to the point that I am considering returning the watch. The principle purpose for the purchase was the heart-rate functionality.
Please advise. ciq.forums.garmin.com/.../1462129.png