"Fix with Claude" stops opening terminal after some uses

Bug Description

The "Fix with Claude" action (from VS Code diagnostics) intermittently stops opening a terminal. It works for some time and then breaks — no terminal opens when clicking the action.

Steps to Reproduce

1. Open a file with diagnostics/errors in VS Code
2. Click "Fix with Claude" on a diagnostic
3. It works initially — opens a Claude Code terminal and addresses the issue
4. After some number of uses (varies), clicking "Fix with Claude" no longer opens a terminal
5. Nothing happens — no terminal, no error

Expected Behavior

"Fix with Claude" should consistently open a terminal with Claude Code every time it's clicked.

Actual Behavior

Works intermittently. After several successful uses, it silently fails — clicking the action produces no response.

Environment

• OS: Ubuntu Linux (6.17.0-14-generic)
• VS Code: latest
• Claude Code extension: latest