Copilot CLI interactive mode turns blank after submitting a prompt in Windows Terminal, while -p mode works

Describe the bug

Summary

In interactive mode, GitHub Copilot CLI renders normally at first, but after I submit a prompt the UI goes blank and no further output is visible.

This happens even with very short prompts that should return only a single sentence.

Non-interactive prompt mode with -p works normally, so the issue appears to be specific to the interactive terminal UI.

Environment

• GitHub Copilot CLI version: 1.0.71
• OS: Windows
• Terminal: Windows Terminal
• GitHub product version: latest

Affected version

GitHub Copilot CLI 1.0.71.

Steps to reproduce the behavior

1. Open Windows Terminal.
2. Start Copilot CLI: copilot
3. Enter any prompt, including a short prompt such as: Reply with one short sentence only.
4. Observe that Thinking appears briefly.
5. The terminal UI then goes blank.

Expected behavior

After submitting a prompt in interactive mode, Copilot CLI should continue showing Thinking and then render the response in the terminal.

What actually happened

• Copilot CLI starts and renders normally.
• I enter a prompt.
• It shows Thinking.
• Then the screen turns blank.
• After the blank screen appears, I do not see the response or UI content anymore.

This also happens with very short prompts, including prompts that should only produce a one-sentence response.

Additional context

I tried the following and still saw the same blank-screen behavior in interactive mode:

• Pressed Ctrl + L
• Pressed ?
• Entered /help
• Tried very short prompts with minimal output
• Tried --screen-reader mode: copilot --screen-reader
  --screen-reader mode shows the same issue.

What does work

Non-interactive mode works correctly:

copilot -p "Say hello"

This returns output normally.

まず、短いプロンプトを使って Windows Terminal で copilot により問題を再現し、次にインタラクティブモードと copilot -p "Say hello" および copilot --screen-reader を比較します。インタラクティブモードで引き続き Thinking が表示され、空白になる代わりに応答がレンダリングされ、非インタラクティブモードも引き続き動作すれば、修正は完了です。