macOS Desktop sidebar keeps deleted conversations as ghost entries

Bug description

A conversation that I deleted on Android is still displayed as a ghost entry in the ChatGPT Desktop sidebar on my Mac.

The conversation is no longer visible on Android or on the web version of ChatGPT. However, it remains in the macOS Desktop sidebar. When I click it, the conversation cannot be opened and an error is shown.

Environment

• ChatGPT Desktop version: 26.901.31953
• Mac: Apple Silicon M3
• VPN/proxy: No
• The issue started approximately one week ago and is still reproducible.

Steps to reproduce

1. Delete a conversation on Android.
2. Open ChatGPT Desktop on macOS.
3. The deleted conversation still appears in the sidebar.
4. Click the conversation.
5. The conversation fails to open.

I have already:

• signed out and signed back in;
• completely quit and restarted the app;
• uninstalled and reinstalled the ChatGPT Desktop app.

The problem persists.

Diagnostic evidence

I checked the ChatGPT Desktop logs and found that the server explicitly reports that this conversation has already been deleted.

Conversation ID:

6a96f009-5b00-83ed-8630-f928aa379b0d

The log shows:

errorCode=conversation_deleted
status=404
method=get
url=/conversation/6a96f009-5b00-83ed-8630-f928aa379b0d

The server response says:

Чат был удален. Начните новый чат.

(“The chat was deleted. Start a new chat.”)

The desktop app then also attempts to delete the same conversation and receives another 404:

errorCode=conversation_deleted
status=404
method=delete
url=/conversation/id/6a96f009-5b00-83ed-8630-f928aa379b0d

This appears to indicate that the server-side conversation is already deleted, but the macOS Desktop sidebar/session state still contains a stale reference to the deleted conversation.

Expected behavior

Once a conversation is deleted, it should disappear from the Desktop sidebar as it does on Android and the web.

Actual behavior

The deleted conversation remains permanently visible as a ghost entry in the macOS Desktop sidebar and cannot be opened.

Please investigate the Desktop sidebar/conversation synchronization or stale conversation reference handling.

No source files or tests are named. Start by reproducing the Android deletion and macOS sidebar behavior, then inspect the Desktop sidebar or conversation-session state using the reported get and delete 404 logs. Done means a server-deleted conversation is removed from the macOS sidebar and no longer produces an open error.