[BUG] Only last skill shows green indicator when multiple skills activated in parallel

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 activating multiple skills in a single response using parallel Skill tool calls, only the last skill displays the green indicator dot in the UI.

What Should Happen?

All activated skills should display green indicator dots in the UI sidebar, showing the user that multiple skills are active.

Error Messages/Logs

No error. This is a UI display issue - skills work correctly but only the last one shows visual indicator.

Steps to Reproduce

1. Create 2+ custom skills in ~/.claude/skills/ (e.g., cremax-development and frontend-design)
2. Ask Claude: "use skill development and frontend-design"
3. Claude calls Skill tool twice in parallel for both skills
4. Look at the UI sidebar - only /frontend-design has green dot
5. Verify both skills work by asking questions about either skill's domain

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.0.73

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

Screenshot attached showing only /frontend-design with green indicator after activating both skills.

Both skills ARE functionally loaded and working - Claude correctly uses instructions from both. The issue is purely visual feedback in the UI.