Windows Desktop regression: chat history for projects on mapped network drives disappears from sidebar after updating to 26.608.12217

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

Version 26.608.12217

What subscription do you have?

Plus $20/mo

What platform is your computer?

25H2 Build 26200.8457

What issue are you seeing?

After updating the Windows Codex Desktop app from:

Version 26.602.71036
Released Jun 8, 2026

to:

Version 26.608.12217
Released Jun 9, 2026

the chat history associated with project directories located on mapped network drives disappeared from the project sidebar.

The affected chats do not appear to have been deleted. I can still find and open them through search, but only when I already know a term that appeared in the previous conversation. This makes older chats effectively undiscoverable through normal navigation.

Projects located on local drives do not appear to be affected.

Reverting the Windows desktop app to version 26.602.71036 restores the expected behavior. The mapped-network-drive projects and their chat history become visible again in the sidebar.

Environment

• Product: Codex Desktop app
• Operating system: Windows 11
• Windows build: 25H2 Build 26200.8457
• Broken Codex Desktop version: 26.608.12217
• Broken version release date: Jun 9, 2026
• Last known working Codex Desktop version: 26.602.71036
• Working version release date: Jun 8, 2026
• Installation source: Microsoft Store
• Affected project location: mapped network drive, for example S:\web
• Network share type: [Samba]

What steps can reproduce the bug?

Steps to reproduce

1. Map a network share to a Windows drive letter, for example:

Z: → \\server\share

1. Add or open a Codex project located on the mapped network drive, for example:

Z:\projects\example

1. Create one or more chats associated with that project.

1. Confirm that the project and its chats are visible in the project sidebar while running Codex Desktop version 26.602.71036.

1. Update Codex Desktop to version 26.608.12217.

1. Open the same project or inspect its sidebar history.

Actual behavior

The chat history associated with projects on mapped network drives is missing from the sidebar.

The chats remain partially accessible through search when entering a known term from a previous chat. This suggests that the underlying chat records still exist, but the project-to-chat association is not being surfaced correctly in the normal sidebar UI.

What is the expected behavior?

Existing chats for projects located on mapped network drives should remain visible and navigable in the sidebar after an application update, the same as chats for projects located on local drives.

Additional information

The issue appears limited to projects located on mapped network drives.

Observed behavior:

| Project directory type | Behavior on 26.608.12217 |
| --------------------------------------------------- | ------------------------------------ |
| Local drive, such as C:\projects\example | Chat history remains visible |
| Mapped network drive, such as Z:\projects\example | Chat history disappears from sidebar |
| Search using a known previous term | Missing chat can still be found |

Regression confirmation

Reverting from 26.608.12217 to 26.602.71036 restores the missing mapped-network-drive chat history in the sidebar without recreating the projects or chats.

This strongly suggests a regression introduced between those two Windows desktop builds.

Impact

Users with projects stored on mapped network drives may believe their chat history has been deleted. Although the chats may still exist and may be searchable, they are difficult or impossible to rediscover unless the user already remembers a search term from the missing conversation.