issue: upstream failure mid-stream truncates /api/chat/completions SSE with no error frame or [DONE]
![issue: upstream failure mid-stream truncates /api/chat/completions SSE with no error frame or [DONE]](https://www.chat-gpts.plus/wp-content/uploads/2026/09/29628-271ce5fc-768x403.jpg)
当 OpenAI 兼容上游在 Open WebUI 已经转发 200 响应头之后断开连接时, /api/chat/completions 的 SSE 流会被静默截断——没有错误帧、没有 [DONE] ,客户端往往把它当成“正常结束的空回复”。优先排查上游(如 LiteLLM、Bedrock)是否在流








