OneSignal incident
Message Delivery - Delayed inteligent/timezone notification deliveries
OneSignal experienced a minor incident on June 17, 2026 affecting Push and Email and 1 more component, lasting —. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Jun 17, 2026, 06:24 AM UTC
Status: Investigating What’s happening: Delivery of inteligent/timezone notifications will be delayed, we’re investigating the situation Who’s affected: • All customers may be affected Current Status: We are investigating the issue and will provide an update in 10 minutes Affected components Email (Degraded performance) SMS (Degraded performance) In-App Messages (Degraded performance) Push (Degraded performance)
- identified Jun 17, 2026, 06:38 AM UTC
Status: Identified We have identified the root cause and are working towards a resolution. We will provide another update in 15 minutes Affected components In-App Messages (Degraded performance) Push (Degraded performance) Email (Degraded performance) SMS (Degraded performance)
- resolved Jun 17, 2026, 06:55 AM UTC
Status: Resolved We have applied a mitigation that resolves the impact. We are monitoring to confirm effectiveness. Intelligent/timezone notifications were delayed for 45m. No regular direct notifications were impacted. Affected components Email (Operational) SMS (Operational) In-App Messages (Operational) Push (Operational)