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A campaign that stops sending is worse than one that performs badly, because nobody notices. The platform watches for two situations and raises an alert on its own. You don’t have to go looking.

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Sequence stalled

A sequence is stalled when all of this is true:
  • It is active and has live enrollments.
  • At least one lead should be producing an action right now — it isn’t in a delay, isn’t waiting for an invitation to be accepted, and isn’t waiting for a person.
  • Nothing was sent in the last 26 hours, and nothing is planned for the next 26 hours.
  • At least one sender in the pool actually had working hours yesterday or today.
That last condition matters: a pool whose senders don’t work at weekends is not stalled on a Sunday.

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Sender running dry

A sender in an active sequence has fewer than 2 days of new leads left, measured as leads with no outbound step yet, divided by its current daily invitation allowance. The alert clears on its own once the sender is back above 3 days, so topping up doesn’t leave a stale warning behind.

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What happens when one fires

Each alert is raised once per occurrence. It resolves by itself when the cause goes away, and only fires again if the problem comes back. There is no dismiss button, because a dismissed alert would hide a real problem.

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Why isn’t this sending?

You don’t have to wait for an alert. Two buttons run the same diagnosis on demand:
  • Why isn’t this sending? on the sequence top bar
  • The same button on a sender’s page
It checks senders, caps, schedules, health and lead supply, and answers in plain words: one reason, then each cause with a what to do next. Claude answers the same question with the same diagnosis when you ask “why isn’t anything sending?”.

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Common causes and fixes