modelOutputInMessagesEnabled set to true but still the same

Hi, i set "modelOutputInMessagesEnabled": true but I still see the transcription of assistant’s speech inside the conversation history instead of model’s output.
see call ID fb941981-c42f-45db-95f1-6898f164524f, all conversation history messages don't include diacitic signs but many messages returned with sign from the LLM (Azure OpenAI). few messages includes other words as well. for example the mesgage on exact local time 2025-08-11 23:15:54.327 the LLM returned "לא בדיוק, בֵּלָה. נסי לחזור..." but the message history show "לא בדיוק בלה נסיא לחזור...".
I tried to set the modelOutputInMessagesEnabled on both assistant level and assistantOverrides (see call id d7483629-f52f-4ff4-855a-9638a26db285) still not working. I tried set the modelOutputInMessagesEnabled only on assistantOverrides still not working.
Please help.
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