Assistant replies missing from desktop history after using voice mode on mobile

What version of the Codex App are you using (From “About Codex” dialog)?

26.901.41600

What subscription do you have?

Pro 20x

What platform is your computer?

Darwin 25.6.0 arm64 arm

What issue are you seeing?

A task started in Codex desktop was later continued in the mobile app, where voice mode was used at some point.

When I returned to the desktop app, assistant replies were missing from the conversation, although those same replies were visible on mobile.

Restarting desktop immediately restored the display of new assistant replies. However, replies that were missing before the restart never reappeared in desktop history. They remain visible on mobile.

What steps can reproduce the bug?

1. Started a task in the Codex macOS desktop app.
2. Continued that same task in the mobile app.
3. Used voice mode on mobile during the conversation.
4. Later returned to the desktop app.
5. New assistant replies were not displayed in the desktop conversation. User messages and “Worked for…” indicators were visible.
6. Checked the same conversation on mobile: the assistant replies were visible there.
7. Restarted Codex desktop.
8. New assistant replies immediately displayed correctly on both desktop and mobile.
9. Previously missing replies remained absent from desktop history and visible on mobile.

What is the expected behavior?

Conversation history should remain consistent across desktop and mobile when continuing the same task between devices, including when using mobile voice mode.

Restarting desktop should load all existing assistant replies.

Additional information

• Codex desktop version: 26.901.41600
• macOS version: 26.6.2 (25G83)
• Mobile app version: 1.2026.237 (33230022603)
• Mobile OS: 26.5.2
• Voice mode used on: mobile app
• Date observed: September 6, 2026
• Reproducibility: Observed in one existing task; not yet tested in a fresh task.

Start by reproducing the desktop-to-mobile handoff with mobile voice mode, then compare the conversation on both clients before and after restarting desktop. Trace the desktop conversation-history loading and cross-device synchronization paths; done means all assistant replies remain visible on desktop without requiring a restart and match mobile history.