`stream disconnected before completion` reproduces after recreating the conversation

[diny1203-sudo]

stream disconnected before completion reproduces after recreating the conversation

Summary

A conversation that was recreated from scratch still hits the same failure mode during generation. The model starts responding normally, then the stream disconnects before completion and the desktop client retries 5 times.

Steps to reproduce

1. Start a new conversation in the Codex desktop app.
2. Run the same image-generation workflow prompt again in a fresh chat.
3. Let the model begin streaming its response.
4. Observe that the stream disconnects before completion and the client shows repeated reconnect attempts.

Observed behavior

• The response begins normally and then stops mid-stream.
• The client shows:
  • Reconnecting... 1/5
  • Reconnecting... 2/5
  • Reconnecting... 3/5
  • Reconnecting... 4/5
  • Reconnecting... 5/5
  • stream disconnected before completion: An error occurred while processing your request.
• The issue reproduces even after recreating the conversation.

Request IDs

• 3c818545-aead-41f8-a4fe-a75128ed737c
• 8b909f78-0b3c-4d37-96b5-322bbd83d373

Local log signals

• Received turn/started for unknown conversation
• Timed out waiting for structured result

Notes

• I do not see a direct 5xx or socket error in the local logs, but the repeated reconnects and unknown-conversation events suggest a conversation routing or stream stability problem.
• I can share the relevant local log excerpts if helpful.

Environment

• Codex Desktop Version: [请填写版本号，如 26.422.30944]
• macOS Version: [如 macOS 15.x]
• Model: gpt-5.3-codex

Related Issues

This appears to be related to:

• Codex App reconnect loop and stream disconnected before completion on 26.422.30944 #19440 - Codex App reconnect loop and stream disconnected before completion
• Codex Desktop on macOS gets stuck reconnecting because failed/completed turns are restored with markedStreaming=true #19690 - Codex Desktop gets stuck reconnecting because failed/completed turns are restored with markedStreaming=true
• Frequent reconnect loop in Codex App: websocket closed by server before response.completed #18960 - Frequent reconnect loop in Codex App: websocket closed by server before response.completed

[github-actions]

Potential duplicates detected. Please review them and close your issue if it is a duplicate.

• Codex App reconnect loop and stream disconnected before completion on 26.422.30944 #19440
• Frequent reconnect loop in Codex App: websocket closed by server before response.completed #18960
• macOS app: stream disconnected before completion after image_generation_call events #19122
• Desktop: first turn sometimes shows "Reconnecting... 2/5" even though app-server transport remains connected #18471
• Codex Desktop on macOS gets stuck reconnecting because failed/completed turns are restored with markedStreaming=true #19690

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