Outage in One Signal
Apple push notifications failing in about 3% of cases
Resolved Minor
August 04, 2026 - Started 14 days ago
- Lasted about 2 hours
Incident Report
Summary AI Generated
Apple push notifications via OneSignal experienced a ~3% failure rate for approximately 2 hours, with users encountering "Unknown delivery error" or "APNS failed to provide a response" errors. The root cause was identified as a change in how Apple's push notification connections behave. A mitigation was applied and was under monitoring for confirmation of effectiveness.
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
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Latest Updates ( sorted recent to last )
MONITORING
13 days ago - at 08/04/2026 06:46PM
We have applied a mitigation that should resolve the impact. We are monitoring to confirm effectiveness.
We will provide another update in 20 minutes.
IDENTIFIED
13 days ago - at 08/04/2026 06:45PM
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.
INVESTIGATING
14 days ago - at 08/04/2026 05:20PM
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
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