Flow sending delays

Summary

Flow sending delays

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.

• Started

  Sep 21, 2026 · 11:56 AM

• Resolved

  Sep 21, 2026 · 1:58 PM

• Duration

  2h 2m

• Severity

  Minor

• ◐

  Investigating

  Sep 21 · 11:56 AM Klaviyo

  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.

• ◐

  Investigating

  Sep 21 · 11:56 AM Klaviyo

  We are continuing to investigate this issue.

• ◆

  Identified

  Sep 21 · 12:26 PM Klaviyo

  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.

• ◉

  Monitoring

  Sep 21 · 12:42 PM Klaviyo

  Flow message sending is recovering, and delays are clearing. 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.

• ◉

  Monitoring

  Sep 21 · 1:43 PM Klaviyo

  Delays have now largely cleared but some customers may still see flow messages send later than expected. We continue to monitor closely and will share another update shortly.

• ✓

  Resolved

  Sep 21 · 1:58 PM Klaviyo

  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.