When someone is mentioned in the notifications, there is only the sign on the “bell” icon in a very simple way, without any more interesting visual appeal, but when viewing the mention it does not fade immediately and does not even disappear, causing tremendous confusion about what has already been viewed, answered and/or answered.

It would be possible to improve the form of identification that is mentioned in a notification and especially that its change of state be in real time as soon as it is answered.

Note: A suggestion in filters would be to create a new filter for notifications/chats where there is a mention of a user or your own user and that their status be updated as soon as this mention is answered.