[BUG] AWS_BEARER_TOKEN_BEDROCK auth broken on v2.1.94

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 I use claude.exe in Windows environment and ask a question to claude, claude dose not work and show following message.

403 {"Message":"Authorization header is missing"}

What Should Happen?

Claude should response to my question.

Error Messages/Logs

Steps to Reproduce

Set AWS_BEARER_TOKEN_BEDROCK, CLAUDE_CODE_USE_BEDROCK=1, AWS_REGION
Run claude (v2.1.94) → enter interactive mode → send any question → 403

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

v2.1.92

Claude Code Version

v2.1.94

Platform

AWS Bedrock

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

This bug is also reproduced in git bash terminal.