# Amplitude: Major incident: Amplitude web application not loading

**Summary:** Amplitude reported a major US web application outage starting 2026-04-23 19:56 UTC, resolved at 2026-04-23 20:32 UTC (35 min). Customers could encounter page-loading errors; EU and data ingestion were unaffected, with no data lost. Amplitude attributed the issue to a misconfigured feature-flag configuration and reverted the change. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2026-04-23 19:56 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/rk108nkj8x4s](https://stspg.io/rk108nkj8x4s)
- [Company: Amplitude](https://rewindex.com/company/amplitude.md)
- Versions: before (none: first archived) → after incident\_version:49/80xxgtxyc2vj@7774fc9472ce
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Amplitude web application not loading
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-04-23 19:56 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-04-23 20:32 UTC
```

**6. Added: Affected components**

```diff
+ Analytics - Web Application, Audiences - Web Application, Data - Web Application, Experiment - Web Application, Guides & Surveys, MCP, Web Application
```

**7. Added: Update** (investigating) · 2026-04-23 19:56 UTC

```diff
+ Amplitude web application in US is not accessible. The issue started around 12:20 PST we're still investigating the root cause.  Amplitude in EU is working as expected.  a) Our ingestion systems were working as expected and we were not losing any data.  b) Impacted customers might experience errors when loading Amplitude web pages.
```

**8. Added: Update** (monitoring) · 2026-04-23 20:02 UTC

```diff
+ We have identified the issue to be related to a misconfigured configuration in our feature flags. We have reverted the change as of 1PM PT and we should be back to normal now. We'll still monitor this for a bit before resolving the issue.
```

**9. Added: Update** (resolved) · 2026-04-23 20:32 UTC

```diff
+ This incident has been resolved.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-04-23 19:56 UTC | Major incident: Amplitude web application not loading (this change) | outage |

All Amplitude changes: [timeline](https://rewindex.com/company/amplitude/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/i24a9b318baa3a7 · Markdown: https://rewindex.com/change/i24a9b318baa3a7.md · JSON: https://rewindex.com/api/v1/changes/i24a9b318baa3a7 · Generated 2026-10-18T01:54:29.873Z