[BUG] When a Task agent (e.g., `statusline-setup`) returns its result, fragments of the output text appear floating in the center of the screen instead of rendering correctly in the chat flow.

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?

Environment

• Claude Code version: v2.0.73
• OS: Windows 11 Pro
• Terminal: Windows Terminal

### Bug Description
When a Task agent (e.g., statusline-setup) returns its result, fragments of the output text appear floating in the center of the screen instead of rendering correctly in the chat flow.

### Steps to Reproduce

1. Run /statusline command
2. Interact with the statusline-setup agent
3. Wait for agent to complete and return results
4. Observe text fragments appearing at wrong screen coordinates

### Expected Behavior
Agent output displays normally inline with the chat flow.

### Actual Behavior
Random text fragments from the agent response render floating in the center/middle of the terminal screen, detached from the normal output flow.

### Screenshots

What Should Happen?

Claude code should display properly in powershell

Error Messages/Logs

Steps to Reproduce

### Steps to Reproduce

1. Run /statusline command
2. Interact with the statusline-setup agent
3. Wait for agent to complete and return results
4. Observe text fragments appearing at wrong screen coordinates

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

v2.0.73

Platform

Other

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information