Klaviyo change history: Meta Services Disruption

Klaviyo reported a major outage affecting WhatsApp messaging, Meta integrations, and Instagram connectivity from 2026-06-12 14:49 UTC to 2026-06-12 17:30 UTC (2 h 40 min), caused by an upstream provider disruption. Services returned to normal; failed messages were reprocessed, but a small number that never reached Klaviyo could not be recovered.