#[BUG] User prompt missing from conversation tree even though assistant replied to it (evidence )

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tardy dockBOT
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Reported by @fiery sand

Bug Report: [BUG] User prompt missing from conversation tree even though assistant replied to it (evidence )
`Steps to Reproduce`

https://chatgpt.com/share/67f371ec-d530-800f-90ee-43a309b3dfd6

`Expected Result`

User prompt generally persistent in conversation tree, and user/assistant prompts alternate, usually referring to the next conversation turn as its child node.

`Actual Result`

SEE SHARED CONVO FOR SELF-CONTAINED EVIDENCE AND ANALYSIS.
Inspecting the json file that's fetched on page load (containing message parts), it is clearly visible that there is an assistant-assistant chain, and that the model received the 2nd prompt, but the backend did not store it as a conversation turn.

`Environment`

MacOS Sequoia 15.4, using the MacOS ChatGPT app v1.2024.084 when issue occurred. Noticed stop button didn't change back to Up arrow after generation.

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Additional Information

Please provide relevant details to help resolve the issue, such as:

  • ChatGPT Shared Link (if applicable).
  • Screenshots or videos demonstrating the problem.

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fiery sand
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LLM reply quotes a user prompt that is not present in the conversation thread or JSON export (an no, it's not a hallucination - it coherently answers the missing prompt and quotes part of it as well). The message clearly reached the model, but was never stored, breaking conversation continuity and traceability.

See the conversation for more details, as it's more or less a self-contained bug report within.