Buildkite change history: Buildkite service disruption

Buildkite’s major disruption affected Web UI, REST API, Agent API and job queues, causing failed requests, delayed scheduling and artifact-upload issues. Started 2026-09-09 19:07 UTC; resolved 2026-09-10 01:54 UTC (6 h 46 min), with full customer recovery reported since 20:28 UTC. An autoscaling feedback loop overwhelmed the Redis cluster with connections.