[BUG] Terminal output is broken - most of the response text is invisible/hidden.

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?

Terminal output is broken - most of the response text is invisible/hidden.
Only fragments of text appear with large empty spaces between them.

Environment:

• Windows 10 (19045.5487)
• Claude Code v2.0.73
• Opus 4.5

Steps to reproduce:

1. Run claude in Windows Terminal or PyCharm terminal
2. Send any prompt in Russian (Cyrillic text)
3. Claude reads files and generates response
4. Response text is mostly invisible, only small fragments appear
5. UI elements (boxes/frames) render incorrectly

The issue persists in both PyCharm terminal and Windows Terminal.
Debug logs show responses are generated, but terminal doesn't display them properly.

resolve:

Downgrade to v2.0.72 fixes the issue.
The bug was introduced in v2.0.73.

What Should Happen?

the terminal should work without any white space as before

Error Messages/Logs

Steps to Reproduce

Downgrade to v2.0.72 fixes the issue.
The bug was introduced in v2.0.73.

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.0.73

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PyCharm terminal

Additional Information

_No response_