【报Bug】为什么我的uni-ai开启流stream报SYSTEM_ERROR，Unable to get object content

代码中的参数options和seeChannel见机密信息。

 const llmManager = uniCloud.ai.getLLMManager(options)  
        let streamRes = await llmManager.chatCompletion({  
            messages: [{"role":"user","content":"你好"}],  
            stream: true,  
            sseChannel: seeChannel  
        })  
        console.log(streamRes)  
        return {  
            errCode: 0,  
            errMsg: ''  
        }

之前该代码中streamRes会打印{errCode: 0}
但是不知道什么时候开始，返回的是

{"_events":Object,"_eventsCount":0,"_maxListeners":undefined,...}  
打开后显示  
{"errCode": "SYSTEM_ERROR","errMsg": "Unable to get object content"}

使用的是nginx代理，且代理配置好了proxy_buffering off;

其中还会报错

03:58:44.955 [本地调试]SyntaxError: Unexpected token a in JSON at position 0  
03:58:44.957 [本地调试]    at JSON.parse (<anonymous>)  
03:58:44.957 [本地调试]    at IncomingMessage.emit (node:events:517:28)  
03:58:44.957 [本地调试]    at addChunk (node:internal/streams/readable:368:12)  
03:58:44.957 [本地调试]    at readableAddChunk (node:internal/streams/readable:341:9)  
03:58:44.957 [本地调试]    at Readable.push (node:internal/streams/readable:278:10)  
03:58:44.957 [本地调试]    at HTTPParser.parserOnBody (node:_http_common:131:24)  

14:06:20.422 [本地调试]Error [ERR_UNHANDLED_ERROR]: Unhandled error. (SyntaxError: Unexpected token a in JSON at position 0  
14:06:20.422 [本地调试]    at JSON.parse (<anonymous>)  
14:06:20.422 [本地调试]    at IncomingMessage.emit (node:events:517:28)  
14:06:20.422 [本地调试]    at addChunk (node:internal/streams/readable:368:12)  
14:06:20.422 [本地调试]    at readableAddChunk (node:internal/streams/readable:341:9)  
14:06:20.422 [本地调试]    at Readable.push (node:internal/streams/readable:278:10)  
14:06:20.422 [本地调试]    at HTTPParser.parserOnBody (node:_http_common:131:24))  
14:06:20.422 [本地调试]    at new NodeError (node:internal/errors:405:5)  
14:06:20.422 [本地调试]    at R.emit (node:events:506:17)  
14:06:20.422 [本地调试]    at IncomingMessage.emit (node:events:517:28)  
14:06:20.422 [本地调试]    at addChunk (node:internal/streams/readable:368:12)  
14:06:20.422 [本地调试]    at readableAddChunk (node:internal/streams/readable:341:9)

使用uni-ai计费网关，不管是否开启stream，都是正常的。
使用openai，关闭stream是正常的，开启的话就会报这两个错误。
apiKey和proxy都是正常。
runtime中，Nodejs8，Nodejs12，Nodejs18都试过了。
之前是好的，运行正常的。不知道怎么回事。