The one that gets me is if a person I am friends with replies to a comment from someone I'm not friends with on a public post with a lot of comments. Facebook

The one that gets me is if a person I am friends with replies to a comment from someone I'm not friends with on a public post with a lot of comments. Facebook puts this in my news feed saying "X replied to a comment on this post" and showing the post. But if I go to comments, it doesn't surface the comment that my friend replied to (or their reply). Why tell me the comment exists and then not let me see it?