[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?

When Claude starts working after I send an instruction, the working/status indicator (spinner word) is not redrawn in place. A new line is printed on every frame, so the same word (e.g. "court") stacks up into many repeated lines and keeps accumulating as the operation continues.

Example of what appears:

court

court

court

... (repeats many times)

What Should Happen?

The status/spinner should animate on a single line (redraw in place), not append a new line on each frame.

Error Messages/Logs

No error messages — display-only rendering glitch. The repeated lines are not saved to the transcript (.jsonl); grep finds 0 occurrences.

Steps to Reproduce

1. Launch the claude CLI in the VS Code integrated terminal.
2. Send an instruction that triggers a long-running response or many tool calls.
3. While Claude is working, watch the status/spinner line.
4. The status word (e.g. "court") is printed as a new line every frame and stacks into many repeated lines.

Pattern: more likely when the output is long, or after a lot of work in the same long session (large context). Frequency increases with how long the operation runs.

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.183 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

VS Code integrated terminal

Additional Information

Using the claude CLI in the VS Code integrated terminal. The VS Code companion extension is also installed (IDE integration). VS Code 1.125.0, macOS Tahoe 26.5.1 (25F80).
(No screenshot captured yet; will add one if it reproduces again.)