# Retell AI: Concurrency not cleared up

- Impact (vendor’s label): minor
- Status: resolved
- Started: 2025-06-09 22:52 UTC · Resolved: 2025-06-09 23:14 UTC · Duration: 22 min
- Updates: 2 · Affected components: End to End Calling - Telephony, Phone Call, End to End Calling - Web Call, Web Call
- [Vendor status page: https://stspg.io/0661fd2bc8xv](https://stspg.io/0661fd2bc8xv)
- [Company: Retell AI](https://rewindex.com/company/retell-ai.md)

## Timeline of updates

- **identified** 2025-06-09 22:52 UTC: 3:15pm PDT: There starts to have a resource initialization problem with single prompt agents, causing the concurrency counter to pile up and not get cleared, and caused subsequent calls to get rejected 3:30pm PDT: a fix is starting to get rolled out, and we are resetting concurrency counters for everyone to unblock the calls in the meantime.
- **resolved** 2025-06-09 23:14 UTC: 4:12pm: The fix has been deployed, and we've cleared the concurrency counter again to remove all the effects from the issue.


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Canonical: https://rewindex.com/company/retell-ai/incidents/htzk0sc8lll5 · Markdown: https://rewindex.com/company/retell-ai/incidents/htzk0sc8lll5.md · JSON: https://rewindex.com/api/v1/companies/retell-ai/incidents/htzk0sc8lll5 · Generated 2026-10-20T00:14:20.056Z