You'll notice
Useful2 Signal2
Turning off auto-replies now explains what happens to a watch this session was carrying.
What's wrong with this entry?
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What
Stopping auto-replies for a session now tells you that a watch this session was carrying is ended or stays disarmed for anything continuing from it, not just that a new session re-arms on publish.
Evidence
Auto-replies are disarmed for the rest of this session (a new session re-arms on publish; a watch this session carried is ended or stays disarmed for its continuations).
Strings lifted out of the shipped bundle, so the claim above can be checked against them.