Changes / OneSignal / Apple push notifications failing in about 3% of cases

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

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 from the diff below (Sol; type: incident outage). Check the diff before relying on it.

Major incidentLabel: outage (model (Jev), 40%)Changed Detected Source: status.onesignal.com

What changed

AddedTitle#1
Before: not present
After: Apple push notifications failing in about 3% of cases
AddedImpact#2
Before: not present
After: major
AddedStatus#3
Before: not present
After: resolved
AddedStart time#4
Before: not present
After: 2026-08-04 17:20 UTC
AddedResolved time#5
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After: 2026-08-04 19:24 UTC
AddedUpdateinvestigating#6
Before: not present
After: 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
AddedUpdateidentified#7
Before: not present
After: 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.
AddedUpdatemonitoring#8
Before: not present
After: We have applied a mitigation that should resolve the impact. We are monitoring to confirm effectiveness. We will provide another update in 20 minutes.
AddedUpdateresolved#9
Before: not present
After: The issue has been resolved. All impacted systems are now operating normally.

First version of this incident archived by Rewindex. View the live incident.

History of this incident

When (UTC)ChangeKind
Major incident: Apple push notifications failing in about 3% of cases (this change)
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.
Major incident

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