[BUG] Duplicated output sections

[lpotthast]

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?

When Claude (in Claude Code) responds (e.g. by providing a plan result), sections of its output are duplicated. Sometimes a single section. Sometimes multiple. I don't know whether the actual model output has that issue or it being a CLI rendering-bug. But it is extremely frustrating and happening for over a week now.

What Should Happen?

Output sections must not be duplicated.

Error Messages/Logs

Steps to Reproduce

Ask anything, wait for long response.

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

No response

Claude Code Version

2.1.141

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

No response

[github-actions]

Found 3 possible duplicate issues:

1. [Bug] Section blocks duplicated in streamed long assistant replies #58973
2. [BUG] Duplicate / flickered output in terminal scrollback on long sessions (classic renderer) #52825
3. [Bug] Large assistant messages duplicate in terminal output #53718

This issue will be automatically closed as a duplicate in 3 days.

• If your issue is a duplicate, please close it and 👍 the existing issue instead
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🤖 Generated with Claude Code

[github-actions]

This issue has been automatically closed as a duplicate of #58973.

If this is incorrect, please re-open this issue or create a new one.

🤖 Generated with Claude Code

[github-actions]

This issue has been automatically locked since it was closed and has not had any activity for 7 days. If you're experiencing a similar issue, please file a new issue and reference this one if it's relevant.