Windows: Page Up / Page Down do not scroll chat while the message composer is focused

What version of the Codex App are you using (From “About Codex” dialog)?

26.908.40824

What subscription do you have?

ChatGPT Plus

What platform is your computer?

Windows x64

What issue are you seeing?

When the message composer has keyboard focus, pressing Page Up or Page Down does not scroll through the conversation.

This makes navigating long conversations significantly more difficult for users who rely on keyboard navigation or assistive input methods.

The same keyboard behavior works correctly in:

• the ChatGPT web app;
• the ChatGPT Classic Windows app.

This issue has been present for several app versions, since the redesigned Windows app replaced ChatGPT Classic.

What steps can reproduce the bug?

1. Open a conversation that is longer than one screen.
2. Place keyboard focus in the message composer.
3. Press Page Up or Page Down.

What is the expected behavior?

Page Up and Page Down should scroll the conversation even while the message composer is focused, unless those keys are explicitly required for editing content inside the composer.

The behavior should be consistent with the ChatGPT web app and ChatGPT Classic.

Additional information

This is an accessibility regression for users who depend on keyboard navigation or assistive input systems.

Start by reproducing the issue in the Windows x64 app with a long conversation and the message composer focused, then compare Page Up and Page Down behavior with the ChatGPT web app and ChatGPT Classic. Done means both keys scroll the conversation while focus remains in the composer, unless they are needed for editing.