claude-code - 💡(How to fix) Fix [BUG] Fullscreen mouse movement generates garbage characters in input command line [2 comments, 3 participants]

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anthropics/claude-code#52443Fetched 2026-04-24 06:07:07
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Error Message

Error Messages/Logs

RAW_BUFFERClick to expand / collapse

Preflight Checklist

  • I have searched existing issues and this hasn't been reported yet
  • This is a single bug report (please file separate reports for different bugs)
  • I am using the latest version of Claude Code

What's Wrong?

I just installed Claude and this is my first time using it. I entered /TUI Fullscreen then I moved my mouse. I see garbage characters being generated on the input command line.

What Should Happen?

As I move my mouse around, I'm not expecting garbage characters to be generated.

Error Messages/Logs

Steps to Reproduce

  1. Enter /TUI Fullscreen
  2. Move the mouse

Claude Model

Sonnet (default)

Is this a regression?

No, this never worked

Last Working Version

No response

Claude Code Version

Claude Code version 2.1.118

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Windows Terminal

Additional Information

When I restarted Claude and entered /tui fullscreen it said I was already in fullscreen and not getting garbage. I then entered /tui default and now I can't enter any command. Screen shot

<img width="1908" height="740" alt="Image" src="https://github.com/user-attachments/assets/b465afcd-5ba2-4be8-92fd-72ebd2e93c3a" />

Now I restart Claude and issue /tui fullscreen and now I get the garbage

<img width="1920" height="1128" alt="Image" src="https://github.com/user-attachments/assets/cf4d7c8d-9eaf-4f95-bf06-3bdcc8c105f7" />

extent analysis

TL;DR

The issue with garbage characters being generated on the input command line when moving the mouse in Claude's TUI Fullscreen mode may be related to a compatibility or rendering issue.

Guidance

  • Try resetting the terminal or shell settings to their defaults to see if it resolves the issue.
  • Verify that the problem persists across different terminal or shell applications to isolate if it's specific to Windows Terminal.
  • Check for any known issues or updates related to the Anthropic API or Claude Code version 2.1.118 that might address rendering or compatibility problems.
  • Consider testing the TUI Fullscreen mode with a different Claude model, such as a non-default model, to see if the issue is model-specific.

Example

No specific code snippet is applicable in this case, as the issue seems to be related to the interaction between Claude and the terminal environment.

Notes

The provided screenshots and steps to reproduce suggest a visual or rendering issue rather than a code-specific problem. The fact that restarting Claude and switching between TUI modes sometimes temporarily resolves the issue indicates a potential state or initialization problem.

Recommendation

Apply workaround: Given the lack of a clear code-related issue and the potential for this being a compatibility or rendering problem, the best immediate course of action is to try workarounds such as resetting terminal settings or testing different environments until a more definitive fix can be identified.

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claude-code - 💡(How to fix) Fix [BUG] Fullscreen mouse movement generates garbage characters in input command line [2 comments, 3 participants]