Vibration does not work normally after recent software update. All notification alerts are on and do-not-disturb is off.
Every time device is restarted, it vibrates once for first received message and then stop vibrating but only notification on device screen.
Vibration fails in all activities function, such as breathwork has no vibration at all.
Personally doubted vibration part in device is failed. But this vivosmart was bought in Jan 2023, just use for less than two months..