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Klaviyo: Flow sending delays

Affected components: Email SendingFlows - Email SendingFlows - ProcessingProcessingFlows - Text Message SendingText Message SendingFlows - Mobile Push SendingMobile Push SendingFlows - WhatsApp SendingWhatsApp Sending

Timeline of updates

1. investigating2026-09-17 17:10 UTC

   We are investigating reports of delays affecting flow message sending. Some customers may see flow messages send later than expected. We will share another update as soon as we have more information.

2. identified2026-09-17 17:31 UTC

   We have identified the cause of the delays affecting flow message sending and are working on a fix. Some customers may continue to see flow messages send later than expected while we resolve this. We will share another update shortly.

3. identified2026-09-17 18:30 UTC

   We are seeing early signs of improvement and continue to work towards full recovery. Customers may still see flow messages send later than expected. We will share another update shortly.

4. monitoring2026-09-17 19:21 UTC

   Flow message sending is recovering, and delays are continuing to clear. Some customers may still see flow messages send later than expected as remaining processing catches up. We continue to monitor closely and appreciate your patience throughout this incident.

5. resolved2026-09-17 19:46 UTC

   Flow message sending has fully recovered and is processing at normal speeds. Delayed messages were not lost and have since been delivered. This incident has been resolved.

Impact, status and times are the vendor’s own, as last archived. View on stspg.io (opens in new tab). Klaviyo profile · Recent Klaviyo incidents · Markdown · JSON