[BUG] Ctrl+G external editor leaves large empty whitespace gap in standard macOS Terminal

Preflight Checklist

• [ ] 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?

After using Ctrl+G to open $EDITOR (vim), saving and closing leaves a large block of empty whitespace in the conversation. "Save and close editor to continue..." banners appear with ~50+ blank lines between and below them, pushing the input prompt far off screen.

This is similar to #32467 but reproduces in the standard macOS Terminal.app without tmux or any terminal multiplexer.

It is also similar to #32744 , but the conversation history does not get wiped, it just requires scrolling up for a while to find it.

What Should Happen?

Prompt appears directly below the conversation with no extra whitespace.

Error Messages/Logs

Steps to Reproduce

1. Open macOS Terminal.app
2. Start claude
3. Press Ctrl+G to open vim
4. Save and close (:wq!)
5. Observe large empty whitespace between editor banners and the input prompt

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.72

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

• #32467 — similar whitespace issue in tmux
• #32744 — similar issue in standard macOS terminal