Just today, I had a discussion in the comments in this question and suddenly I realized that all my comments below the question (including a comment below one of the answers) are gone.
Now, I know that comments are second-class citizens which can be removed at a whim and should not contain important information. So, I would completely understand it if all comments below the question had been purged or moved to chat.
However, in this particular case, only my own comments were removed, which looks more like a bug than intentional moderation.
What happened?