[BUG] Korean/English (Han/Eng) toggle key inputs "[57358u" in VS Code terminal when using Claude Code

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 I open Claude Code in the VS Code terminal and press the Korean/English toggle key, it keeps typing "[57358u" repeatedly. This doesn't happen when I do the same thing in the regular Mac terminal instead of the VS Code terminal.

What Should Happen?

Pressing the Korean/English toggle key should switch the input method between Korean and English.

Error Messages/Logs

Steps to Reproduce

1. Open VS Code terminal
2. Launch Claude Code by typing claude
3. Press the Korean/English (Han/Eng) toggle key
4. [57358u is repeatedly inputted instead of switching the input method

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.84

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

VS Code integrated terminal

Additional Information

_No response_