[Bug]: Qwen3.5-35B-A3B merged SFT BF16 intermittently produces NaN logits and exclamation-only output on H20 (v0.19.1; HF control finite)
![[Bug]: Qwen3.5-35B-A3B merged SFT BF16 intermittently produces NaN logits and exclamation-only output on H20 (v0.19.1; HF control finite)](https://www.chat-gpts.plus/wp-content/uploads/2026/10/59381-d36a4086-768x403.jpg)
该问题出现在 vLLM 0.19.1 以 BF16 加载 Qwen3.5-35B-A3B(MoE + GDN)合并 SFT 权重做长输入生成时,偶发出现 NaN logits,并整段输出 token ID 0(渲染为连续英文感叹号)。优先排查点是 GDN prefill 内核与缓存路径是否触发了非有


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