Apple

I have had the Series 8 for about 6 months now. The first few months the heart rate monitor worked just fine while working out, now i have long chunks of time where it cannot read my heart rate during workouts. Knowing my cardio heart rate times is really important to me so this has been frustrating. I can have up to 75% of the workout with the heart rate monitor spinning and not recording my heart rate.

Anyone else have this issue and know how to solve it?

I have my band tightened and the watch is updated.