# Customer.io: Major incident: Investigating Connectivity Issues

> Major incident: Investigating Connectivity Issues. Detected 2026-10-22 by Rewindex: what changed on Customer.io’s status page, with the before/after diff.

Canonical: https://rewindex.com/change/idf88565c1f174f
Last updated: 2026-10-22T07:34:04Z

**Summary:** _summary pending_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2026-06-14 00:00 UTC · Detected: 2026-10-22 07:34 UTC
- [Source: https://status.customerio.com/incidents/d8kbv2c6dw19](https://status.customerio.com/incidents/d8kbv2c6dw19)
- [Company: Customer.io](https://rewindex.com/company/customer-io.md)
- Versions: before (none: first archived) → after incident\_version:241/d8kbv2c6dw19@5db998061060
- Change 1 of 1 for this incident

Incident page (full timeline): [Investigating Connectivity Issues](https://rewindex.com/company/customer-io/incidents/d8kbv2c6dw19.md)
## What changed

**1. Added: Title**

```diff
+ Investigating Connectivity Issues
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-06-14 00:00 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-06-14 00:00 UTC
```

**6. Added: Update** (investigating) · 2026-06-13 21:18 UTC

```diff
+ We are aware of an issue affecting access to our web application. Customers may encounter ERR_CONNECTION_REFUSED when attempting to access the UI. At this time, we are not aware of any impact beyond UI accessibility. Message processing and delivery continue to operate normally. Our team is actively investigating the issue and working to restore full service as quickly as possible. We will provide updates as more information becomes available.
```

**7. Added: Update** (identified) · 2026-06-13 22:21 UTC

```diff
+ The team has identified the issue and is actively working on a fix
```

**8. Added: Update** (monitoring) · 2026-06-13 23:46 UTC

```diff
+ A fix has been implemented and the systems are recovering. We are monitoring UI for any other issue.
```

**9. Added: Update** (resolved) · 2026-06-14 00:00 UTC

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

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-06-14 00:00 UTC | Major incident: Investigating Connectivity Issues (this change) | outage |

All Customer.io changes: [timeline](https://rewindex.com/company/customer-io/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._

## Cite this

Major incident: Investigating Connectivity Issues on Customer.io’s status page, changed 2026-06-14 00:00 UTC (change 1 of 1).

- Canonical URL: https://rewindex.com/change/idf88565c1f174f
- Citation: Customer.io, “Major incident: Investigating Connectivity Issues” (2026-06-14 00:00 UTC). Archived by Rewindex: https://rewindex.com/change/idf88565c1f174f (CC BY 4.0).
- Markdown link: `[Customer.io: Major incident: Investigating Connectivity Issues (2026-06-14)](https://rewindex.com/change/idf88565c1f174f)`


---
Canonical: https://rewindex.com/change/idf88565c1f174f · Markdown: https://rewindex.com/change/idf88565c1f174f.md · JSON: https://rewindex.com/api/v1/changes/idf88565c1f174f · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-04T15:55:17.945Z