[BUG] Connecting to ide in a second instance crashes the first instance

Environment

• Platform (select one):
• [X] Anthropic API
• [ ] AWS Bedrock
• [ ] Google Vertex AI
• [ ] Other: <!-- specify -->
• Claude CLI version: 1.0.35 (Claude Code)
• Operating System: macOS 15.4
• Terminal: iTerm2

Bug Description

Connecting to an ide in a second claude instance crashes the first instance due to MCP connection being lost.

Steps to Reproduce

1. Run claude
2. Run /ide and connect to Cursor
3. Run claude in a second terminal
4. Run /ide and connect to Cursor

Expected Behavior

Both connect to IDE and work seamlessly

Actual Behavior

First instance crashes due to MCP server disconnecting it

Additional Context

Made me feel sad