[BUG]

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?

I am using Claude Code in Warp, and for all of my sessions today, you have been persistently repeating the outputs, sometimes five and six times, but not the entire output. It's usually for long responses. Using the most recent version of Claude Code, I am using the most recent version of Warp. This wasn't happening to me yesterday; it has happened to me in nearly every single session I have had today. I've got bypass permissions turned on for what it's worth.

What Should Happen?

The output should not be repeating itself.

Error Messages/Logs

"The repeating output is a Claude Code terminal rendering bug, not
   me actually re-sending the message. It happens when long output triggers the TUI to repaint
  scroll regions and the buffer falls out of sync. The content was sent once - your terminal is
  just redrawing it as you scroll.                                                               
   
  Quick things to try:                                                                           
  1. Resize the terminal window (drag a corner) - usually forces a clean repaint
  2. Ctrl+L to clear and redraw                                                                  
  3. /clear in Claude Code if it persists into the next message
  4. If it keeps happening across sessions, worth filing at                                      
  https://github.com/anthropics/claude-code/issues with a screenshot - they fix TUI bugs fast    
                                                                                                 
  Likely contributing factors on my end that make it worse:                                      
  - Very long single message (the analysis was big)                                              
  - Heavy use of box-drawing characters in tables                                                
  - Mixed content widths                                                                         
                                                                                                 
  For next time, I can split long analyses into 2-3 shorter messages to reduce the buffer
  pressure. Want me to do that as a default for big reports going forward?        "

Steps to Reproduce

It's been pretty consistent all day Just open up a Claude Code session and ask for a response. If it's more than a couple of sentences, it's been happening to me all day.

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.119 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Warp

Additional Information

_No response_