Watch Vibration with No Notification

I using a TicWatch E2 with Facer App Version 5.1.9_10306. My watch sometimes vibrate, not activated by any notification. In fact, I have disable all apps notification on my watch.

Does anyone have similar issue and how to stop it.

Any advice is most appreciated. Thank you.

I use a TicWatch C2 for testing only and I also have all the notifications turned off in it. BUT it vibrates every time I get a Google Calendar notice even though it doesn’t display that I have a notice. I have searched all the settings including the developer options and I can’t find any way to turn off the vibrating function. The vibrate pattern setting has the choice of “Normal” “Long” and “Double”. The least Google could do is give an option for “Off”.