[BUG] Vim `read-only` even when in `insert mode`

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?

The steps to reproduce:

1. Run /vim to enable vim mode
2. Press Escape in the input box
3. "This is read-only" appears despite -- INSERT -- still showing

What Should Happen?

1. Run /vim to enable vim mode
2. Press Escape in the input box
3. It should switch to NORMAL mode.

Error Messages/Logs

This is read-only mode.

Steps to Reproduce

1. Run /vim to enable vim mode
2. Press Escape in the input box
3. "This is read-only" appears despite -- INSERT -- still showing

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.69

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_