Klaviyo change history: Issue with Time Delays in Flows

Klaviyo reported a major degradation starting 2026-08-27 00:09 UTC: some profiles stalled at flow time delays, affecting email, text messaging, push, and WhatsApp sending. Campaigns and flows without time delays were unaffected. A fix was deployed and affected-message processing completed; the incident resolved at 2026-08-27 03:42 UTC after 3 h 33 min.