XF 1.5 Link to first unread post from Forum List?

When I click a link to a thread from the Forum List, am I supposed to jump to the first unread post?

It seems like it takes me to the first post in the thread every time.

Add-on conflict perhaps? Or is this a feature?
But if I open a post, close my browser, then wait a few hours for new posts to be added, that link should take me to the first unread message, right?

Just want to have my ducks in a row when explaining things to my users. My users. OMG. Today, one of them is looking for a Start New Thread button on the completely unrelated home page. :(