Your query found one user-to-user chat which had threading enabled. If I’d realised the settings for user-to-user chats were found by clicking the heading I could have found it easily. That really is not intuitive at all. I turned threading off. Now, the “My threads” link is absent (for me now).
I believe from reading topics here that threading is on by default for direct messages. Is that still the case, and is there or will there be an option to make it off by default? Thank you.