#[Bug] Custom GPT & Project Instructions ignored — system_hints: [] confirmed in backend payload

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rigid raftBOT
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Reported by @honest shard

Bug Report: [Bug] Custom GPT & Project Instructions ignored — system_hints: [] confirmed in backend payload
`Steps to Reproduce`
  1. Log in to ChatGPT Plus account
  2. Open any Custom GPT or Project with instructions set
  3. Send a message
  4. Open browser DevTools → Network tab → filter "conversation"
  5. Click the conversation request → Payload tab
  6. Observe "system_hints" field
`Expected Result`

system_hints should contain the Custom GPT or Project instructions, which are then passed to the model and followed in the response.

`Actual Result`

system_hints returns an empty array []. Instructions are never transmitted to the model. The model responds as if no instructions exist. This affects all instruction layers: Custom GPT Instructions, Project Instructions, and general custom settings. Confirmed across multiple devices (Windows, multiple browsers, iPhone iOS app). A free account on the same device and IP works correctly at the same time. OpenAI Support case #05833474 — unresolved.

`Environment`

ChatGPT Plus | GPT-5.2 | Windows (multiple browsers) + iPhone iOS app

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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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