[BUG] OAuth MCP reconnection fails after successful authentication. "Authentication successful, but server reconnection failed" Version: 2.1.71

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?

OAuth MCP reconnection fails after successful authentication.
"Authentication successful, but server reconnection failed"
Version: 2.1.71

What Should Happen?

OAuth MCP reconnection fails after successful authentication.
"Authentication successful, but server reconnection failed"
Version: 2.1.71

Error Messages/Logs

Steps to Reproduce

OAuth MCP reconnection fails after successful authentication.
"Authentication successful, but server reconnection failed"
Version: 2.1.71

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

Version: 2.1.71

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_