[BUG] Content gets duplicated in the terminal

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?

When the terminal window is resized after Claude outputs wide content (markdown tables, code blocks with long lines), the content gets visually duplicated in the terminal.

What Should Happen?

When the terminal window is resized after Claude outputs wide content (markdown tables, code blocks with long lines), the content gets visually duplicated in the terminal.

Error Messages/Logs

Steps to Reproduce

1. Ask Claude a question that produces a wide markdown table or a long code block
2. Resize the terminal window height or width after the response is rendered
3. Observe that parts of the output appear duplicated

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.144

Platform

Other

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

When the terminal window is resized after Claude outputs wide content (markdown tables, code blocks with long lines), the content gets visually duplicated in the terminal.

To reproduce

1. Ask Claude a question that produces a wide markdown table or a long code block
2. Resize the terminal window height or width after the response is rendered
3. Observe that parts of the output appear duplicated

Expected behavior

Terminal content reflows cleanly without duplication.

Actual behavior

Content (especially wide tables and code blocks) is duplicated after resize, e.g.:

  public EmptySqlDependencyFilter(ITelemetryProcessor next) => _next = next;

      public void Process(ITelemetry item)
      {
      public EmptySqlDependencyFilter(ITelemetryProcessor next) => _next = next;

      public void Process(ITelemetry item)
      {