Prefect Horizon incident

Delayed builds from GitHub pushes

Resolved after 1 hour 9 minutes, affecting Builds, on October 21, 2026.

resolved Oct 21, 2026, 05:43 PM UTC

GitHub webhook deliveries have recovered and builds are starting normally again.

Started
Oct 21, 2026, 04:34 PM UTC
Resolved
Oct 21, 2026, 05:43 PM UTC
Duration
1h 9m
Detected by Pingoru
Oct 21, 2026, 04:34 PM UTC

Affected components

Builds

Update timeline

  1. monitoring Oct 21, 2026, 04:34 PM UTC

    Builds triggered by GitHub pushes are starting 10–25 minutes late. GitHub is having an incident that delays webhook deliveries (githubstatus.com: http://githubstatus.com). Builds run normally once they start, and running servers are not affected. We're monitoring and will update when delivery times return to normal.

  2. resolved Oct 21, 2026, 05:43 PM UTC

    GitHub webhook deliveries have recovered and builds are starting normally again.

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