Disruption with Copilot next edit suggestions

Summary

Disruption with Copilot next edit suggestions

On June 17, 2026, between 16:57 UTC and 19:14 UTC, Copilot code completions were degraded and users were unable to receive Next Edit Suggestions. Standard ghost text code completions were not affected. This was due to a configuration change that caused the service's routing layer to incorrectly discard all Next Edit Suggestion model endpoints as invalid.<br /><br />We mitigated the incident by deploying a corrected configuration change at 18:55 UTC, with full recovery observed at 19:14 UTC.<br /><br />We are working to improve the resilience of our routing layer to limit impact due to a subset of invalid configurations, and to improve our alerting to detect sudden traffic changes that are not captured by standard error rate monitors.

• Started

  Jun 17, 2026 · 5:57 PM

• Resolved

  Jun 17, 2026 · 7:28 PM

• Duration

  1h 30m

• Severity

  Minor

• ◐

  Investigating

  Jun 17 · 5:57 PM GitHub

  We are investigating reports of impacted performance for some GitHub services.

• ◐

  Investigating

  Jun 17 · 6:40 PM GitHub

  We have identified a likely cause and are applying a mitigation

• ◐

  Investigating

  Jun 17 · 7:09 PM GitHub

  We have applied mitigation and are seeing recovery

• ◉

  Monitoring

  Jun 17 · 7:14 PM GitHub

  The degradation has been mitigated. We are monitoring to ensure stability.

• ✓

  Resolved

  Jun 17 · 7:28 PM GitHub

  On June 17, 2026, between 16:57 UTC and 19:14 UTC, Copilot code completions were degraded and users were unable to receive Next Edit Suggestions. Standard ghost text code completions were not affected. This was due to a configuration change that caused the service's routing layer to incorrectly discard all Next Edit Suggestion model endpoints as invalid.<br /><br />We mitigated the incident by deploying a corrected configuration change at 18:55 UTC, with full recovery observed at 19:14 UTC.<br /><br />We are working to improve the resilience of our routing layer to limit impact due to a subset of invalid configurations, and to improve our alerting to detect sudden traffic changes that are not captured by standard error rate monitors.