【报Bug】uni.openDocument 打开文档成功但是不显示

示例代码：

                    this.begindown = true;  
                    var url = 'https://xxxxx/wx/p/9004?sid=' + sid + '&ctype=1&cid=' + cid;  
                     sid=48yo我KqMLyytKpGSZ mZ2v43luuPaXYpcLalawhwMDAwRqdrxQIoBAAIC&ctype=1&cid=3451083'  

                    const downloadTask = uni.downloadFile({  
                        url: url, //下载地址接口返回  
                        success: (data) => {  
                            uni.hideLoading()  

                            //console.log("========report====downloadTask====successed=======", data)  
                            var pages = getCurrentPages();  
                            console.log("======== currentpage===", pages.length, [pages.length - 1].toString())  
                            if (pages[pages.length - 1].route === 'pages/reportBody/reportBody') {  
                                this.tmpfile = data.tempFilePath;  
                                console.log("-----------tmp dir:", data.tempFilePath)  
                                setTimeout(() => {  
                                    this.begindown = false;   
                                    //打开文档查看  
                                    console.log("==========filepath============", this.tmpfile, this.filetype)  

                                    uni.openDocument({  
                                        filePath: data.tempFilePath,  
                                        fileType: this.filetype,  
                                        success: function(res) {  
                                            uni.hideLoading();  
                                            console.log('打开文档成功', res);  
                                        },  
                                        fail() {  
                                            uni.showToast({  
                                                title: '暂不支持此类型',  
                                                duration: 2000  
                                            });  
                                            uni.hideLoading();  
                                        }  
                                    });  

                                }, 100)  
                            }  
                        },  
                        fail: (err) => {  
                            uni.hideLoading();  
                            console.log("download err.........................")  

                            console.log(err);  
                            uni.showToast({  
                                icon: 'none',  
                                mask: true,  
                                title: '失败请重新下载',  
                            });  
                        },  
                    });  

                    downloadTask.onProgressUpdate((res) => {  

                        this.progress = res.progress;  
                        this.downloadfilesize = res.totalBytesWritten;  
                        console.log('下载进度' + this.progress);  
                        // console.log('已经下载的数据长度' + res.totalBytesWritten);  
                        // console.log('预期需要下载的数据总长度' + res.totalBytesExpectedToWrite);  
                    });  

                } 

操作步骤：

参加附件代码

预期结果：

正常显示文档

实际结果：

未能显示文档