[Bug]: Viewing an active terminal from mobile creates a duplicate desktop terminal tab #10486

Operating system

macOS

Orca version

1.4.153-rc.3

Details

Short summary

Viewing an active Orca terminal from a paired mobile client causes the macOS host to open an additional terminal tab. The new tab shows the same terminal content as the existing tab.

What happened?

An active Codex terminal was viewed from Orca on a phone. Afterward, the desktop Orca window contained an extra terminal tab with the same content as the original terminal.

The extra tab was manually closed. The issue then reproduced again after using the mobile view, so this was not a one-time stale UI artifact.

How can we reproduce it?

1. On the macOS host, keep an active agent terminal open in Orca.
2. Connect to Orca from a phone and view that terminal.
3. Return to the desktop Orca window.
4. Observe that an additional terminal tab has appeared with the same content as the original tab.
5. Close the extra tab and repeat the mobile-view flow; the duplicate tab can appear again.

Expected behavior

The mobile client should attach to or mirror the existing terminal without creating another terminal tab on the desktop host.

Actual behavior

A second terminal tab appears on the desktop and displays the same content as the original terminal.

Additional notes

• Reproduced twice on Orca 1.4.153-rc.3.
• The duplicate tab can be closed manually, but that is only a temporary workaround.
• Terminal handles and PTY/process IDs were not captured before closing the duplicate, so it is not yet known whether this is a duplicate UI mirror of the same PTY or a separately resumed process.
• A screenshot was captured, but it contains private conversation content and is intentionally not attached. A fully redacted tab-bar-only crop can be provided if needed.
• This may be a mobile-specific regression or residual variant related to [Bug]: Remote client resumes live host agent sessions, spawning duplicate TUIs on the same provider session #8878, [Bug]: Remote host restoring/spawning terminal tabs that were manually closed #9352, and [Bug]: Duplicate pi terminal tab spawned on worktree switch (session restore), even with Agent sleep off #10208, but the trigger here is viewing the terminal from a phone rather than switching worktrees or using a second desktop client.