ElevenLabs incident

Degraded SIP Calls – Transfer to Human Affected

Minor Resolved View vendor source →

ElevenLabs experienced a minor incident on March 31, 2026 affecting Telephony, lasting —. The incident has been resolved; the full update timeline is below.

Started
Mar 31, 2026, 02:15 PM UTC
Resolved
Mar 31, 2026, 02:15 PM UTC
Duration
—
Detected by Pingoru
Mar 31, 2026, 02:15 PM UTC

Affected components

Telephony

Update timeline

  1. investigating Mar 31, 2026, 09:28 AM UTC

    Status: Investigating We are currently investigating an issue with SIP calls that is impacting the transfer-to-human flow. We are working on a fix. Affected components Telephony (Degraded performance)

  2. monitoring Mar 31, 2026, 09:58 AM UTC

    Status: Monitoring We have pushed an update, and we are currently monitoring the situation. Affected components Telephony (Degraded performance)

  3. resolved Mar 31, 2026, 02:15 PM UTC

    Status: Resolved The root cause was an incompatibility in how ElevenLabs handled mid-dialog re-INVITEs. When SIP providers sent re-INVITEs, ElevenLabs responded with 488, which some providers treat as fatal, issue a BYE, and terminate the call. Per RFC 3261, a 488 should not necessarily result in session termination, but provider behaviour varied. Affected components Telephony (Operational)