Cmd+click no longer opens multiple parallel sessions after v2.1.136 update (macOS)

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?

Cmd+click on sessions in the sidebar no longer opens multiple parallel panels. Previously (before the v2.1.136 update on May 8 2026) it was possible to Cmd+click multiple sessions and have them all open side by side — up to 3 sessions were open simultaneously. After updating to v2.1.138, Cmd+clicking sessions in the sidebar only opens a single session, replacing whatever was previously open. Multiple parallel panels no longer work at all.

What Should Happen?

Cmd+clicking sessions in the sidebar should open them as additional parallel panels side by side (up to 4, as per the April 2026 release). Prior to v2.1.136 this worked correctly with 3 sessions open simultaneously.

Error Messages/Logs

Steps to Reproduce

1. Open Claude Code Desktop app on macOS (v2.1.138)
2. Ensure you have at least 2 existing sessions visible in the left sidebar
3. Click on one session to open it in the main panel
4. Hold Cmd and click on a second session in the sidebar
5. Observe: the second session replaces the first panel — it does NOT open as a second parallel panel alongside the first

Expected (pre-v2.1.136 behaviour): Cmd+clicking a session should open it as an additional panel side by side, allowing up to 4 sessions simultaneously.

Actual: The Cmd+click modifier is ignored — the clicked session simply replaces whatever is currently open, as if it were a plain single click.

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

2.1.135

Claude Code Version

2.1.138 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

This is a Claude Code Desktop App issue (not CLI). The parallel sessions feature was introduced in the April 14 2026 release and allowed up to 4 sessions open side by side via Cmd+click. It worked correctly until the v2.1.136 update on May 8 2026 which included "50+ UI/rendering/behavior fixes" — one of those fixes appears to have regressed the Cmd+click multi-panel behaviour.

Updating to v2.1.138 does not restore the functionality.