I have a generation 1 Watch and while I started noticing weird spikes months ago, now with OS4 I think it's getting way, way worse (or maybe it's the hardware itself that it's getting too old?...).
I'm seeing a lot of frequent 120-160 spikes as well as 30-40 dips in my readings. What I've noticed is that these weird values only happen with the automatic readings. If I start a continuous recording session with Cardiogram it's a steady 60-65 for hours (well, at least until the battery dies). But as soon as I turn off the continuous reading... boom, here's the 30 heart rate.
Another thing I noticed, it looks like the spikes/dips are always the first readings, then it starts to correctly read the heart rate. Also, if I move my hand suddenly or do some other irregular movement then I also get weird 120-160/30-40 values.
I mean I would prefer the watch to skip completely everything that is not 100% reliable than to have all these wrong values.
