Hi. I don't know how to define it, but what I mean is to add an automatic update of the username. Currently, if we mention a user in a post and the user changes his username/display name, the mention stops working and redirects to a 404 page.

13 minutes ago, SeNioR- said:

Hi. I don't know how to define it, but what I mean is to add an automatic update of the username. Currently, if we mention a user in a post and the user changes his username/display name, the mention stops working and redirects to a 404 page.

That’s not correct . The name won’t be changed but the link still continues to work. 
Are you seeing this on your community in recent comments ? 

You're right, I mistook it for a deleted user. If we delete the user, the mention remains in the post and then it creates a 404 error.

My original intention was to remove the link to the profile (from mention) if the user gets deleted.