Incident with Copilot
This summary is created by Generative AI and may differ from the actual content.
Overview
Copilot experienced a service disruption between November 5, 2025 23:27 UTC and November 6, 2025 00:06 UTC, where ghost text requests encountered errors from upstream model providers. This incident was a continuation of an earlier service disruption. Users were automatically re-routed to healthy model hosts to minimize impact, and the service was recovered, restoring normal functionality for code completions. Updates to monitors and failover mechanisms are planned to prevent similar future issues.
Impact
Copilot code completions were partially unavailable. The impact on users was minimized by automatically re-routing them to healthy model hosts. The scope of this disruption was more limited compared to an earlier related incident.
Trigger
The incident was triggered by ghost text requests experiencing errors from upstream model providers. This event was a continuation of a service disruption that had occurred earlier on the same day.
Detection
The engineering team became aware of the incident through reports of degraded performance for Copilot, which prompted an investigation.
Resolution
The disability was resolved by automatically re-routing affected users to healthy model hosts. The engineering team recovered the service, restoring normal functionality for Copilot code completions. Additionally, updates to monitors and failover mechanisms are being implemented to mitigate similar issues in the future.
Root Cause
The immediate cause was ghost text requests experiencing errors from upstream model providers. However, the specific root cause for these upstream errors is not detailed in the provided postmortem.