A session the coordinator's delegation, a routine or a hook opened has no user message and no reply, so it was never named and showed as "Untitled conversation". Tasks now name their session too, and a session with no user message is named from the bot's own messages. Until a session is named, Latest activity shows what it opened with, and sessions with no messages are left out of it. Co-Authored-By: Claude Opus 5.5 <[email protected]>