You are not alone. I tried once with a vivoactive 3M user to reset everything and it was not resolved. Still there are some hints to try on the forum to see if they fix it for you. Check if you are experiencing prioblems with the hub SW fix forums.garmin.com/.../sensor-hub-6-64-fix-information
You can also try a master reset (which Garmin sometimes proposes to set things back to original).
Master reset of the vivoactive 3:
- Switch off device (if necessary, press and hold button for 15 seconds). - Press button briefly to switch on device. - As soon as the Garmin logo (blue triangle) appears, press and hold the button until the watch vibrates twice. Then release the button. - Wait for the third vibration and press and hold the button again until the fourth vibration.
If everything was done correctly, you should be able to select the language again.
But ATTENTION:All data will be deleted! Back up with Garmin Express if you still want to.
- Remove your watch from the Garmin Connect App, as well as from the Bluetooth settings of your smartphone: "Remove and add devices in the Garmin Connect App ". - Uninstall the Connect app again, and then turn off your smartphone completely for a few minutes. - After you have turned it back on, reinstall the Connect app on your phone and log in with your usual user data - First, put the vivoactive 3 n pairing mode: activate Bluetooth pairing mode on the vivoactive 3 series and then press "Add device" in the Connect app. - Enter the six-digit pin code displayed on your watch. - Follow the further instructions of the Connect app
Be aware that you probably need to remove the watch from connect and bluetooth to pair again.
In the end, it is unclear why sometimes vibration stops working, it must be software or settings related since most of the times using test mode everything works normal.
