[Bug]: Report "System message must be at the beginning." When using qwen3.6-27B

[RNGMARTIN]

Report "System message must be at the beginning." When using qwen3.6-27B

[chaunceyjiang]

https://huggingface.co/Qwen/Qwen3.5-27B/blob/main/chat_template.jinja#L83-L86

Can you provide the full conversation history? According to the requirements, the message with role=system should always be the first one in the list.