Kryonoglou when you mention someone in a post you are presented with two options.
1). If the user has or has not posted in a thread, you are able to directly mention them like so @Kryonoglou
2). If you want to reply to a user and their specific post while mentioning them, there is typically a number beside the username when you start off with the @ symbol that specifically references their post like so Kryonoglou
Clicking on the 2nd version should display the post you referenced and clicking the referenced post should lead you to the post and not the actual user profile whereas the first does.
This is intentional.