OneSignal incident
Apple push notifications failing in about 3% of cases
OneSignal experienced a minor incident on August 4, 2026 affecting Push, lasting 2h 4m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Aug 04, 2026, 05:20 PM UTC
Status: Investigating 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 Affected components Push (Partial outage)
- identified Aug 04, 2026, 06:45 PM UTC
Status: Identified 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. Affected components Push (Partial outage)
- monitoring Aug 04, 2026, 06:46 PM UTC
Status: Monitoring We have applied a mitigation that should resolve the impact. We are monitoring to confirm effectiveness. We will provide another update in 20 minutes. Affected components Push (Partial outage)
- resolved Aug 04, 2026, 07:24 PM UTC
Status: Resolved The issue has been resolved. All impacted systems are now operating normally. Affected components Push (Operational)