Beginning at 06:00 UTC on Tuesday, Jun 10, 2025, Heroku customers began experiencing a platform service disruption due to an unintended system update applied to our production infrastructure by our vendor. To compound the issue, the Heroku Status site was affected by the outage. Shortcomings in site design and API latency resulted in timeouts, and the Status site appeared as if there were no active incidents. On June 15th we published a summary of our initial investigation, mitigation, and root cause analysis. We also identified the following post-incident remediation objectives: Ensuring immutable infrastructure Increasing resilience of communication channels Accelerating investigation and recovery As promised, we are providing a status update of our continued corrective actions. Ensuring Immutable Infrastructure Our June 15th commitment to customers The root cause of this outage was an unexpected change to our running environment.…