When you are mentioned by someone in a group chat for which you have already muted notifications. Still you will continue to receive notifications if a user in the group replies to on your sent messages or mentions you in the thread.
How to Mute Mention Notifications on WhatsApp?
You can mute notifications of the messages that mention you or are in response to your existing message in a group for which you have already muted notifications on both Android and iOS.
It also works on WhatsApp Web.
Follow These Steps :
Go to profile on WhatsApp
Tap the name of the user.
Find Mute notifications option on Android or Mute on iOS.
You can choose from 3 options 8 hours, a week, or always options to mute notifications.