I got a Venu 3s for Christmas, had a Venu 2s before and haven't experienced the same problem with it. Pulse, steps, stress and intensity minutes are not recorded/measured in periods. On the watch I see graphs from the entire period for stress and heart rate, but in the app there are empty fields. Steps are neither counted on the watch nor shown in the app. When this happens, training sessions with intensity minutes are not recorded either. I have to restart the watch to get it to measure again.