Both. I took the watch off between 2-4pm and wore it from 4pm onwards and it picked up on nothing until 23:30 when I opened the app within the app store to refresh it. So no steps, heart rate, body battery, nothing. So even though I was wearing the watch. It recorded nothing between those hours.
So the watch does not show any HR, and does not count any steps anymore? If so, then try restarting it, and if it does not help, you can try the hard reset, or even the master reset to factory defaults. And if it still does not help, reach out to the Product Support.
