The page says waitlist_offer_expired_without_delivery , and the on-call view is painfully specific: a fitness class seat was offered, the offer expired, but the member-facing state never moved beyond "sending. " The team wanted SMS event notification alerts; the Node. js worker submitted one, yet...
Source: [Dev.to](https://dev.to/liraelvex6403/sms-event-notification-alerts-with-delivery-status-polling-for-fitness-waitlists-37ce)