Codex desktop on Windows

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

Version 26.901.51231

What subscription do you have?

Pro

What platform is your computer?

Microsoft Windows NT 10.0.26200.0 x64

What issue are you seeing?

On 9 September 2026, I noticed that a long-running conversation only displayed messages from that morning onward. Earlier conversation history was no longer accessible.

The affected task is also missing from mobile Remote. Other tasks from the same PC are accessible through Remote, including their conversations from yesterday.

Read-only investigation found hundreds of earlier user messages in the local session file, but not a complete sequence of corresponding assistant replies. The local history database currently indexes only today's exchanges for this task. The cause is unconfirmed.

Expected behaviour: the complete conversation remains accessible in the desktop app and through Remote.

Please investigate the missing history and advise whether the original conversation can be recovered without deleting or overwriting existing records.

This conversation contains private information. Please request any additional diagnostic files through a private channel.

What steps can reproduce the bug?

Feedback ID: 019fd4e2-794c-71b3-be71-28fe6176afb5

What is the expected behavior?

I want to be able to view entire chat history. It has disappeared.

Additional information

No response

Start with Feedback ID 019fd4e2-794c-71b3-be71-28fe6176afb5 and the reported local session file and history database, preserving the existing records during investigation. Done means identifying why earlier messages and the task are missing from desktop and Remote, and confirming whether the complete conversation can be recovered safely.