Unclear Only the notice text is known to have changed, not whether replies actually stop when the session is backgrounded.
Claude Code can reply automatically to comments left on an Artifact. The notice about these replies used to say they keep going in the background session, with a summary shown when you return. It now says the replies stop when the session moves to the background. To turn them back on, you publish again from the background session.
This is the opposite of what the notice said before. If you rely on auto-replies, sending a session to the background may leave comments unanswered until you publish again.
Only the notice text is known to have changed, not whether replies actually stop when the session is backgrounded.