@itsericwoodward@itsericwoodward.com Turns out, this is a bug in my config to cache synchronization. Nickname changes in the configuration file are just not synced to the cache at startup if the feed URL already exists in the cache. I must have fixed this typo in my config ages ago, because I don’t even recall having that spelling mistake to begin with. Yet, the cache was happily showing the erroneous nickname. Composing a reply automatically adds the mentions from the conversation participants. Everything originates from the cache, so, I successfully poissoned my replies.