Klaviyo: Campaign Sending Delays
Affected components: Campaigns - Email SendingCampaigns - Mobile Push SendingCampaigns - Text Message SendingCampaigns - WhatsApp SendingEmail SendingMobile Push SendingText Message SendingWhatsApp Sending
Timeline of updates
- identified
Some customers are experiencing delays with campaigns sending, and some scheduled campaigns may appear stuck or show no recipients while they process. We have identified the issue affecting a subset of campaign sending. If a scheduled campaign has not started sending, you can cancel and reschedule it to send again. We are working to resolve this as quickly as possible and will share another update shortly.
- resolved
Campaign sending has returned to normal, and all affected campaigns have been repaired and sent. Between approximately 7:59 AM and 11:45 AM US/Eastern on October 29, 2026, some customers experienced delays sending campaigns, and some scheduled campaigns may have appeared stuck or shown no recipients while they processed. We're sorry for the disruption this caused. This incident has been resolved.
Changes Rewindex caught on this incident
Archive proof
Rewindex commits each version of an incident it captures to a daily checkpoint, chains it to the day before, and has the checkpoint timestamped by FreeTSA and DigiCert.
How the archive is checked, and what it cannot prove.
Rewindex captured this after the last checkpoint; the next run () commits it.
Impact, status and times are the vendor’s own, as last archived. View on status.klaviyo.com (opens in new tab).