# Retell AI: Major incident: Calls failing to start and concurrency stuck

**Summary:** _summary pending_
- Kind: Major incident · Label: major (vendor)
- Changed: 2026-02-10 22:12 UTC · Detected: 2026-10-19 17:03 UTC
- [Source: https://stspg.io/0675g6hmvq57](https://stspg.io/0675g6hmvq57)
- [Company: Retell AI](https://rewindex.com/company/retell-ai.md)
- Versions: before (none: first archived) → after incident\_version:682/p04ts1f3p3tq@8a4857f473c9
- Change 1 of 1 for this incident

Incident page (full timeline): [Calls failing to start and concurrency stuck](https://rewindex.com/company/retell-ai/incidents/p04ts1f3p3tq.md)
## What changed

**1. Added: Title**

```diff
+ Calls failing to start and concurrency stuck
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-02-10 22:12 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-02-10 22:18 UTC
```

**6. Added: Affected components**

```diff
+ End to End Calling - Phone Call, Phone Call
```

**7. Added: Update** (identified) · 2026-02-10 22:12 UTC

```diff
+ There were call initialization issues between 1:35pm and 1:43pm PST. Calls are back online now, but concurrency for some users may be stuck. We are working on a fix.
```

**8. Added: Update** (resolved) · 2026-02-10 22:18 UTC

```diff
+ Calls and concurrency should be back to normal.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-02-10 22:12 UTC | Major incident: Calls failing to start and concurrency stuck (this change) | major |

All Retell AI changes: [timeline](https://rewindex.com/company/retell-ai/changes.md)
_Diff excerpts are shown on normalized text: dates, counters and tokens appear as ‹date›, ‹count›, ‹tok›; noise-only edits are hidden. Rewindex shows the changed passages, not a copy of the page._


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Canonical: https://rewindex.com/change/i2e4d952325e30d · Markdown: https://rewindex.com/change/i2e4d952325e30d.md · JSON: https://rewindex.com/api/v1/changes/i2e4d952325e30d · Generated 2026-10-19T23:13:21.716Z