OneSignal incident: Intermittent incomplete data in the dashboard and API reads for a subset of apps (starting with app id with 0)

1. resolvedOct 15, 2026, 14:51 UTC

   Between 14:31 UTC on Oct 14 and 14:51 UTC on Oct 15, 2026, a subset of apps (apps whose app ID starts with 0) may have intermittently seen incomplete or inconsistent results. The issue affected read requests only. No data was lost, and our primary systems never had incomplete data. It came from a read-only database used for a limited share of read traffic, which we removed from service at 14:51 UTC on Oct 15. Results have been consistent since then. We are adding automated checks to prevent this from happening again. If you saw unexpected results during this window and need help, please contact support.

2. identifiedOct 14, 2026, 14:31 UTC

   We've identified an issue for a subset of apps (app IDs starting with 0).

What APIStatus.watch saw

Our 5-minute checks didn't record a change in OneSignal's overall status around this incident. Smaller or regional incidents often leave a provider's overall status green.

Other services with incidents at the same time

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OneSignal reported 6 incidents in the last 90 days, 3 of them major or critical. A typical incident lasted 37 min. See OneSignal's uptime and incident history