[BUG] AskUserQuestion tool misinterprets numeric input

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?

Per Claude's instructions:

• Tool: AskUserQuestion
• Issue: When "Other" option is selected to provide custom text input, the first character typed is interpreted as a numeric option selection instead of being captured as text input
• Expected behavior: After selecting "Other", all subsequent keystrokes should be captured as the custom text input
• Actual behavior: First keystroke after "Other" is treated as option number selection

Specifically, I was being asked to specify a port number for something to run on, and offered me 5 choices. Choices #1 through #4 were reasonable port numbers, but not the one I wanted, so I chose choice #5, the "something else input it here" option. As usual, the cursor points at the entry field after the option to enter the number, and I started to enter the port number I wanted, 4444, but it interpreted the first "4" keystroke as selection choice #4, which happened to be port 9000, and proceeded as if port 9000 had been my choice.

What Should Happen?

Once I was in "enter something different here" mode, a digit keystroke should be interpreted as the first character of the string being entered, not as a menu selection.

Error Messages/Logs

Steps to Reproduce

What I said above

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

v2.1.1

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_