[BUG] Desktop Linux: sidebar hover flyout closes when moving cursor from hamburger icon toward "Chat" tab, but only when starting from "Code"

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?

Sidebar hover flyout closes when moving the cursor from the hamburger icon toward the "Chat" tab — but only when starting from the "Code" tab. Going Chat → Code works fine.

What Should Happen?

The flyout should stay open while the cursor moves through the adjacent area toward the tab, or at least remain open long enough to reach and click it.

Error Messages/Logs

None observed (pure UI/hover behavior issue, no console errors noticed).

Steps to Reproduce

1. Open Claude Desktop, sidebar collapsed (not pinned, Ctrl+B off).
2. Switch to the Code tab.
3. Hover the hamburger menu icon (top-left) — flyout opens with "Nueva conversación", "Proyectos", "Artefactos", "Personalizar", "Recientes".
4. Move the cursor toward the "Chat" tab in the top bar to click it.
5. Flyout closes before the cursor reaches the tab.

Claude Model

None

Is this a regression?

I don't know

Last Working Version

N/A (no earlier official Linux build existed).

Claude Code Version

1.18286.0 (259c3f)

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

Other

Additional Information

Screen recording available showing exact cursor path and moment of flyout closing. Issue is direction-specific (Code→Chat fails, Chat→Code works).

https://github.com/user-attachments/assets/992f0f59-915c-4478-9d77-a36f7ae0abed