Local sessions never reconnect ("Impossible d'acceder a votre ordinateur") even when the desktop app is running on the same machine

Description
When reopening older local sessions in the Claude Code desktop app (Windows), the app shows: "Impossible d'acceder a votre ordinateur. Il est peut-etre en veille ou hors ligne. Cette session se reconnectera des qu'il sera de nouveau disponible." It then becomes impossible to continue the conversation - only starting a brand new session works.

Steps to reproduce

1. Open the Claude Code desktop app on Windows and let a local session run (started manually, or via a scheduled/recurring task).
2. Close the app, or let time pass.
3. Reopen the app later on the SAME machine, with the app fully running and the machine awake/unlocked.
4. Open one of the older sessions from the sidebar.

Expected behavior
The session reconnects and I can continue the conversation, since the app is running on the exact same computer that created the session.

Actual behavior
The reconnection banner appears and never resolves, even though:

• The app is open and active
• The computer is awake and unlocked
• Fully quitting the app (including from the system tray) and relaunching does not fix it
• This has happened repeatedly, across many different sessions

Environment

• OS: Windows 11 Home 10.0.26200
• Claude Desktop app

Additional notes
Affected sessions include both ones I started manually and ones created by a recurring scheduled task, so the issue doesn't seem tied to one specific session type.