Klaviyo change history: WhatsApp Disruption

Klaviyo reported a critical outage of all WhatsApp functionality, including message sending, integration setup and template editing, due to an upstream provider outage. The incident started at 2026-06-06 17:18 UTC and was marked resolved at 2026-06-06 23:05 UTC, lasting 5 h 47 min; Klaviyo confirmed services were restored after monitoring.