It's Linked stories. It seems to be different is several ways.
Before, whenever you pasted a link or hyperlinked a main post, it would also show up as a related story.
- It seems to happen in comments now too if you expand the comment.
- It's no longer just main stories, "related replies" will also show. If you posted an image in the reply, and link that reply, it will show next to the expanded comment.
- If you paste links instead of using the hyperlink tool, the links disappear, and you now only have "related stories" in your post. (see below)
- I'm sure there'll be more.
It's frustrating because some of us have reoccurring themed posts, and would like to not have to reformat our shit every six months.