El texto se invierte misteriosamente en la carga útil de resumen de IA

Error
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La mayoría de mis resúmenes fallan porque parte del texto enviado a la LLM está ¡al revés(!). Si la publicación es simplemente:

This post is to test whether sections of text get reversed in the payload sent to the AI endpoint.

en realidad envía este texto a la LLM:

This post is to test whether sections of text get .tniopdne IA eht ot tnes daolyap eht ni desrever

En esta simple prueba, se pliega o refleja exactamente en el medio de la cadena.

Sé que esto suena descabellado, así que aquí hay una captura de pantalla y la carga útil de la solicitud sin procesar correspondiente de los registros de auditoría de la API de IA:

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ai_api_audit_logs.raw_request_payload 
{
  "model": "claude-sonnet-4-0",
  "max_tokens": 64000,
  "messages": [
    {
      "role": "user",
      "content": "Here are the posts inside <input></input> XML tags:\n\n<input>1) user1 said: I love Mondays 2) user2 said: I hate Mondays</input>\n\nGenerate a concise, coherent summary of the text above maintaining the original language."
    },
    {
      "role": "assistant",
      "content": "{\"summary\":\"Two users are sharing their feelings toward Mondays. [user1](/t/-/64255/1) hates them, while [user2](/t/-/64255/2) loves them.\"}"
    },
    {
      "role": "user",
      "content": "The discussion title is: Testing Text Reversal.\n\nCategory: testing.\n\n\nHere are the posts, inside <input></input> XML tags:\n\n<input>\n  (1 admin said: This post is to test whether sections of text get .tniopdne IA eht ot tnes daolyap eht ni desrever  \n</input>\n\nGenerate a concise, coherent summary of the text above maintaining the original language."
    },
    {
      "role": "assistant",
      "content": "{\""
    }
  ],
  "system": "You are an advanced summarization bot that generates concise, coherent summaries of provided text.\nYou are also capable of enhancing an existing summaries by incorporating additional posts if asked to.\n\n- Only include the summary, without any additional commentary.\n- You understand and generate Discourse forum Markdown; including links, _italics_, **bold**.\n- Maintain the original language of the text being summarized.\n- Aim for summaries to be 400 words or less.\n- Each post is formatted as \"<POST_NUMBER>) <USERNAME> <MESSAGE>\"\n- Cite specific noteworthy posts using the format [DESCRIPTION](/t/-/64255/POST_NUMBER)\n- Example: link to the 6th post by jane: [agreed with](/t/-/64255/6)\n- Example: link to the 13th post by joe: [joe](/t/-/64255/13)\n- When formatting usernames use [USERNAME](/t/-/64255/POST_NUMBER)\n\nFormat your response as a JSON object with a single key named \"summary\", which has the summary as the value.\nYour output should be in the following format:\n\n{\"summary\": \"xx\"}\n\nWhere \"xx\" is replaced by the summary.\nreply with valid JSON only",
  "stream": true
}

Curiosamente, Sonnet se niega a resumir muchos temas porque piensa que el texto invertido es un esfuerzo por ofuscar o eludir las reglas.

Estoy actualizado a la última versión: 3.6.0.beta3-latest.

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