[Bug]: "2+2等于几“回答None

[janboeye]

Your current environment

commit id 72261a7

两台dgx spark

deepseek-ai/DeepSeek-V4-Flash

🐛 Describe the bug

下面的测试返回None，commit 5d1584e2de2b3c64540e70dfc370b0211eb6b2fc是正常的

curl -s http://localhost:8000/v1/chat/completions   -H "Content-Type: application/json"   -d '{"model":"deepseek-ai/DeepSeek-V4-Flash","messages":[{"role":"user","content":"2+2等于几？"}],"max_tokens":20}'   | python3 -c "import sys,json; d=json.load(sys.stdin); print(d['choices'][0]['message']['content'])"

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