Describe the problem

When using Claude Code CLI in Tabby (version 1.0.229) with multiple split panes, typing Chinese characters causes terminal content to be pushed out of the viewport by the Chinese input method’s candidate box. This issue is exclusive to Claude Code CLI — it does not occur when using other CLI tools (e.g., default terminal, other command-line apps) in Tabby’s split panes. The problem only appears when the input method shows Chinese candidate characters, leading to unexpected displacement or truncation of the terminal’s visible area. The affected Tabby version is 1.0.229.

To Reproduce

1. Open Tabby (version 1.0.229), create multiple split panes (e.g., split horizontally/vertically into 2+ panels via the split pane feature).
2. Launch Claude Code CLI in one of the split panes, and activate a Chinese input method (e.g., Sogou Input, Microsoft Pinyin, Baidu Input).
3. Type Chinese characters in the Claude Code CLI pane (triggering the input method’s candidate box to appear).
4. Observe that the terminal content in the current Claude Code CLI pane (or adjacent split panes) is pushed out of the viewport — parts of the text become invisible due to the candidate box overlapping or shifting the terminal area.

Notes

• No third-party plugins are used, so plugin conflicts are ruled out.
• The issue is specific to Claude Code CLI in split panes; single-pane use of Claude Code CLI or split-pane use of other CLIs works normally with Chinese input.