Copilot CLI fails to function after login — /model command returns blank screen on macOS (v0.0.348)

[SayMyNameTW]

Describe the bug

After signing in to GitHub Copilot CLI under a Copilot Business account, running the /model command briefly shows the list of available models (e.g., GPT-5, Claude, Sonnet 4.5) for a second, then disappears and leaves only a blank screen (as shown in the screenshot). The issue persists after multiple retries and re-logins.

Affected version

No response

Steps to reproduce the behavior

No response

Expected behavior

When executing the /model command, the CLI should properly display the available model list and allow selecting or viewing the current active model.

Additional context

Steps to Reproduce

1. Sign in with a GitHub Copilot Business account (valid subscription).
2. Ensure Copilot CLI Preview is enabled.
3. Run the following command:

copilot /model

4. The model list appears briefly (GPT-5, Claude, Sonnet 4.5, etc.).
5. After about one second, the screen becomes blank and no further interaction is possible.