Blue Box from Hell

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?

"Blue overlay/highlight box stuck in Claude Code on Windows — persists through restarts. Triggered by accidental Ctrl+R.

<img width="1489" height="999" alt="Image" src="https://github.com/user-attachments/assets/15ce6cc8-edc4-4f3e-977d-ea6aee6b2f3a" />

Cannot dismiss with Escape or clicking any other known or suggested commands

What Should Happen?

Scrolling causes blue box to keep appearing, disappearing for a few seconds, then reappearing

Error Messages/Logs

No error messages, but it's hard to keep working with Claude Code with a blue box floating over the input window

Steps to Reproduce

I used online support to try the most common ways to reset and get rid of the blue window. Nothing has worked. I've tried killing the program and restarting, but the blue box keeps reappearing.

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

Sonnet 4.6 Medium

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Windows Terminal

Additional Information

<img width="1489" height="999" alt="Image" src="https://github.com/user-attachments/assets/6ce1355f-def3-4e11-aa3f-99d977149d58" />