I have a venu2 since 4 days. Before I had an vivoactive 3 and now I have the same problem with the heart rate registration. During a cardio workout, it suddenly doesn't register my heart rate correctly (e.g. average 120bpm and then suddenly drops to 75bpm).
Does anyone have a solution? It's very irritating end possibly a reason to send back the watch.
Ps. My husband has also an vivoactive 3 and with his watch I don't experience these troubles.