Synthflow AI incident
Call failures and degraded performance on call transfers
Resolved on August 17, 2026.
What happened A change to our internal telephony configuration was rolled out to production and introduced an unexpected fault in call routing. What was affected • EU region: calls failed from 10:32–10:44 UTC (12:32–12:44 CEST) — 12 minutes. • US region: calls failed from 10:33–10:42 UTC (12:33–12:42 CEST) — 9 minutes. • All regions: warm transfers failed intermittently from 07:00–10:42 UTC (09:00–12:42 CEST) — 3 hours 42 minutes. All services were fully restored by 10:44 UTC. No customer data was affected. What we're doing next We have rolled back the change and added a pre-deployment check to catch this class of routing fault before it reaches production. A full root cause analysis will be published here shortly. We're sorry for the disruption.
Update timeline
- resolved Aug 17, 2026, 08:17 AM UTC
What happened A change to our internal telephony configuration was rolled out to production and introduced an unexpected fault in call routing. What was affected • EU region: calls failed from 10:32–10:44 UTC (12:32–12:44 CEST) — 12 minutes. • US region: calls failed from 10:33–10:42 UTC (12:33–12:42 CEST) — 9 minutes. • All regions: warm transfers failed intermittently from 07:00–10:42 UTC (09:00–12:42 CEST) — 3 hours 42 minutes. All services were fully restored by 10:44 UTC. No customer data was affected. What we're doing next We have rolled back the change and added a pre-deployment check to catch this class of routing fault before it reaches production. A full root cause analysis will be published here shortly. We're sorry for the disruption.
- resolved Aug 17, 2026, 08:17 AM UTC
What happened A change to our internal telephony configuration was rolled out to production and introduced an unexpected fault in call routing. What was affected • EU region: calls failed from 10:32–10:44 UTC (12:32–12:44 CEST) — 12 minutes. • US region: calls failed from 10:33–10:42 UTC (12:33–12:42 CEST) — 9 minutes. • All regions: warm transfers failed intermittently from 07:00–10:42 UTC (09:00–12:42 CEST) — 3 hours 42 minutes. All services were fully restored by 10:44 UTC. No customer data was affected. What we're doing next We have rolled back the change and added a pre-deployment check to catch this class of routing fault before it reaches production. A full root cause analysis will be published here shortly. We're sorry for the disruption.
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