When looking at the parent of a reply, the parent cannot be collapsed

When I click on the "x comments" in the upper right to see responses to my previous posts, it lists out any unread comments to my posts. If I click on the "Parent" link to see my original comment and the reply, I can collapse the reply, but not the parent. This seems like a bug. I can collapse the grandparent, and it all goes away, but I'd expect to be able to collapse the parent as well.