Copilot CLI Reports 'Sandboxing is enabled but is not supported on this host' for latest Windows 25H2 build

Describe the bug

Dear Copilot CLI Dev Team,

when I run copilot cli with the sandbox flag

copilot --experimental --sandbox

I receive a warning

Sandboxing is enabled but is not supported on this host, so shell commands and sandboxed services will fail. Update Windows — supported versions at https://aka.ms/ghcp-sandbox-os-support — or turn sandboxing off with /sandbox disable, or set sandbox.enabled to false in settings.json. See https://docs.github.com/en/copilot/concepts/about-cloud-and-local-sandboxes
Windows Version: 25H2 (Build 26200.9106)

The latest Windows updates are installed including the latest update https://support.microsoft.com/de-de/servicing/os/hotpatch/windows-11/2026/kb5123607-windows-11-24h2-25h2-standalone-cbs-hotpatch according to my windows update history

The sandbox was previously functional

Affected version

v1.0.81

Steps to reproduce the behavior

1. Install latest Windows Build
2. Run copilot --experimental --sandbox

Expected behavior

Sandbox should be functional and no warning message should appear

Additional context

No response

Comienza reproduciendo copilot --experimental --sandbox en Windows 25H2, compilación 26200.9106, con v1.0.81; después, compara el host con las versiones compatibles indicadas en la documentación enlazada sobre la compatibilidad del sistema operativo de sandbox. Se considera completado cuando el host informado se reconoce como compatible y la advertencia ya no aparece al habilitar el sandbox.