[BUG] Clicking thinking blocks no longer expands them in VSCode

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?

I try to click the thinking blocks to expand them

What Should Happen?

Thinking blocks expand.

Error Messages/Logs

Steps to Reproduce

Enable extended thinking and use a thinking model. Send a complex query. Try to click a thinking block to expand it.

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.150

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_