No luck here, restarts didn't cure the problem. ECG seems to work fine, but whenever heart rate starts to elevate due to exercise wild readings from 60-160 when my heart rate during my workout averages 120. It also loses the pulse quite a bit during the workout and can't pick it up again. Resting heart rate and walking around works fine.
Yeah I’m thinking more that it’s a fit issue against my wrist even though it seemed better before the update. When it’s locked on to the pulse it seems ok. It’s also more reliable it seems with a bit of moisture between the watch and wrist.