这两天在小程序上开了个附件下载的功能，开发过程中调试、二维码预览、体验版附件下载都是成功的，上线之后用PC打开小程序下载附件却只会跳出一个“打开文档”，看控制台打印的返回结果也没有报错，这是什么情况？附上代码：

wx.downloadFile({
                        url: url,
                        filePath: newPath,
                        success: function (res) {
                            const filePath = res.tempFilePath;
                            wx.openDocument({
                                filePath: newPath,
                                showMenu: true,
                                fileType: 'xlsx',
                                success: function (res) {
                                    console.log(res)
                                }
                            })
                        },
                        fail: function (res) {
                            wx.showToast({
                                title: res,
                                icon: 'error',
                                duration: 2000
                            })
                            wx.hideLoading();
                        },
                        complete: function (res) {
                            wx.showToast({
                                title: res,
                                icon: 'error',
                                duration: 2000
                            })
                        }
                    })