[BUG] In Linux terminal, Chinese characters do not appear while typing

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?

• OS: Ubuntu 24.04 LTS Desktop, Elementary OS 8.1
• Claude code version: 2.1.14

Problem Description:

When I am on Linux, I open the terminal (GTK terminal in Ubuntu, and the default terminal in Elementary OS), follow the official instructions to install Claude Code, then enter Claude Code.
After switching to a Chinese IME and starting to type using Zhuyin (Bopomofo), the Chinese words do not appear on the screen. they only show up after I press Enter.
This causes the following issues:

1. While typing Chinese, I am basically like a blind person — I can't see the Chinese word at all until I press Enter.
2. During the process of typing Chinese, I cannot select candidate characters.

All the above situations don't appear in the terminals if I don't run claude code.

I have tried ibus and fctix5, same results.

What Should Happen?

While I keyin Chinese in IME in claude in any terminal, the Chinese word should appear even I have not press Enter yet.

Error Messages/Logs

No error messages

Steps to Reproduce

curl -fsSL https://claude.ai/install.sh | bash
claude
/init

switch to Chinese IME and start to keyin any Chinese word.
This problem is not related to the model.
I didn't use any Anthroic API

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

N/A

Claude Code Version

2.1.14

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

GTK-Terminal

Additional Information

N/A