Have you ever used this functionality on the site before? I'm trying to work out if it's caused by something we did recently or it's always been this way. I don't think I've ever clicked on a member mention from an article page.
I don't recall specific instances when I accessed this kind of links, but even hovering over a link would have caught my attention if this behavior had been from the beginning. (I've been regularly reading Bi-Tech for many, many years)