# OneSignal: Apple push notifications failing in about 3% of cases

- Impact (vendor’s label): major
- Status: resolved
- Started: 2026-08-04 17:20 UTC · Resolved: 2026-08-04 19:24 UTC · Duration: 2.1 h
- Updates: 4 · Affected components: Push
- [Vendor status page: https://status.onesignal.com/incidents/01KZ6WMQYFV0EDPQ48J7JTDMFX](https://status.onesignal.com/incidents/01KZ6WMQYFV0EDPQ48J7JTDMFX)
- [Company: OneSignal](https://rewindex.com/company/onesignal.md)

## Summary

OneSignal reported a major incident causing about 3% of Apple push notifications to fail, from 2026-08-04 17:20 UTC to 2026-08-04 19:24 UTC (2 h 4 min). The vendor attributed it to a slight change in how Apple's push notification connections work, applied a mitigation, and confirmed normal operation. _(machine-written, sol)_
## Timeline of updates

- **investigating** 2026-08-04 17:20 UTC: What’s happening: Apple push notifications are failing in about 3% of cases. "Unknown delivery error" or "APNS failed to provide a response" error responses may be seen. Who’s affected:  • Customers using Apple Push Notifications      Current Status: We are investigating the issue and will provide an update in 20
- **identified** 2026-08-04 18:45 UTC: We have identified the root cause and are working towards a resolution. There was a slight change in how Apple's push notification connections work. We will provide another update in 20 minutes.
- **monitoring** 2026-08-04 18:46 UTC: We have applied a mitigation that should resolve the impact. We are monitoring to confirm effectiveness. We will provide another update in 20 minutes.
- **resolved** 2026-08-04 19:24 UTC: The issue has been resolved. All impacted systems are now operating normally.

## Rewindex changes for this incident

- 2026-08-04 17:20 UTC: [Major incident: Apple push notifications failing in about 3% of cases](https://rewindex.com/change/i234e2cb652e33d.md)


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Canonical: https://rewindex.com/company/onesignal/incidents/01KZ6WMQYFV0EDPQ48J7JTDMFX · Markdown: https://rewindex.com/company/onesignal/incidents/01KZ6WMQYFV0EDPQ48J7JTDMFX.md · JSON: https://rewindex.com/api/v1/companies/onesignal/incidents/01KZ6WMQYFV0EDPQ48J7JTDMFX · Generated 2026-10-18T12:43:31.140Z