[BUG] Freezing when typing a lot of text as a tabbed question answer

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

When this kind of tabbed question UI appears:

<img width="1590" height="254" alt="Image" src="https://github.com/user-attachments/assets/039bec0a-874a-4f8a-b2f8-b9f02c0489ad" />

And I select the last option on the first tab (custom text reply), Claude Code freezes if the typed text is more than 6 or 7 lines.

What Should Happen?

Claude Code shouldn't freeze with long text replies to tabbed questions

Error Messages/Logs

Steps to Reproduce

Do something which triggers Claude to ask a multi-tab + submit type of question. On the first tab, choose the last option (custom text entry) and type until it freezes.

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.0.36

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

VS Code integrated terminal

Additional Information

_No response_