It is terribly confusing that a reply to another comment via the Inbox shows up below the comment you are replying to and therefore the most recent comment on the feed appears between two older contributions in the feed, instead of at the top or the bottom. The only obvious deliniator is the thin gray box surrounding the comment and the comment replies. Make it more obvious that the reader is looking at a reply to a comment instead of a general comment with an elbow arrow, indent, or similar clear visual indicator. If you're context switching, this is really tough to follow today.
Thanks for your consideration.