AssemblyAI incident
Some Streaming Sessions are Failing to be Established
Resolved after 11 hours 41 minutes, affecting Streaming API, on September 29, 2025.
We have continued to see good performance since rolling back the update that was identified to be the cause of this issue, so we are marking this issue as resolved.
Affected components
Update timeline
- investigating Sep 29, 2025, 01:49 PM UTC
Between 1:30p and 1:40p GMT there were an increased number of new streaming sessions that were failing to be established. Customers would have received the error message "received 3005 (registered) Session Cancelled: An error occurred; ".
- investigating Sep 29, 2025, 01:50 PM UTC
The Streaming API has now returned to full functionality. Our team is still investigating the root cause of this issue.
- investigating Sep 29, 2025, 03:41 PM UTC
Our team is still investigating the cause of the elevated errors, but the Streaming API is still continuing to function normally.
- monitoring Sep 29, 2025, 07:32 PM UTC
We have continued to see stable performance throughout the day. The Streaming API is operating normally and we are monitoring the effects of recent changes to ensure continued service stability. Our team continues working to determine the root cause of the earlier connection failures.
- resolved Sep 30, 2025, 01:31 AM UTC
We have continued to see good performance since rolling back the update that was identified to be the cause of this issue, so we are marking this issue as resolved.
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