US - Repository Navigation Bar Missing

On June 24, 2025 from 09:42 UTC to 12:11 UTC, the Repository UI was degraded for customers using GitHub Enterprise with Data Residency. During this timeframe, the navigational elements on repository pages would not have been visible, impacting roughly 600 users.

The issue was caused by a change that referenced a new resource for this information, which had not yet been configured for the GitHub Enterprise with Data Residency. Additionally, the change had incomplete coverage of the guardrails we employ to prevent these types of exceptions. Due to safe resiliency practices for these elements, the resulting impact was the loss of those elements on the page. A rollback of the impacting change was performed to restore full functionality to these pages.

To prevent future incidents like this, we are investing in additional monitoring for specific errors resulting from these workflows, expanded coverage of end-to-end testing, and alerting when a sharp increase in resilient fallback behavior happens.

We have deployed a mitigation to the affected instances, and telemetry indicates the error is no longer occurring.

A mitigation is in progress of rolling out to the affected instances. We expect customers to see mitigation within the next hour.

We are investigating reports of degraded performance for the Repositories UI. We have identified that the navigation bar is missing in GitHub Enterprise Cloud with data residency instances for the repositories related pages and are currently attempting a mitigation.