Xiaomi Amazfit Bip S User Manual page 13

certain processes running in the background, which will close the connection
between the watch and the app, and as a result no reminder will be received. Go
to "Profile" - "Amazfit Bip S" - "Run in the background" to learn how to set this in
different mobile phone OS.
View Notifications
When the watch receives a notification alert, it will vibrate to remind you and
automatically display the notification content. If you do not view the notification
immediately, you may swipe up on the watch face page to check the notification
history.