[background-http] events not fired on device

Hi,

I try to upload an image to a Server via backtround-http. It works correct on android and on iOS-Simulator, but on a real iOS-device, the task-events are not fired.

• "@nativescript/ios": "8.1.0",
  

• "@nativescript/background-http": "^5.0.2",
  

• "@nativescript/core": "~8.1.5",
  

Simulator: iOS 15.2
Device: iOS 15.2.1

const bghttp = require("@nativescript/background-http");
let session = bghttp.session("file-upload");
let request = {
        url: this.backendURL + "images/",
        method: "POST",
        headers: imageHeaders,
        description: "multipart/form-data",
    }
let params = [
        { name: "file", filename: imagePath, mimeType: "image/png" }
    ];
let task = session.multipartUpload(params, request);
task.on("progress", function(e) {
            console.log("uploaded " + e.currentBytes + " / " + e.totalBytes);
        });

    task.on("error", function(e) {
        console.log("error!");
        console.log(e);
        console.log(e.response);
    });

    task.on("responded", function(request) {
        console.log("responded");
    }

Any ideas?

I can not reproduce it on severall smartphones/ipads, but have one device with this behavior...

Start by reproducing the multipart upload on a real iOS device using the listed NativeScript, iOS, and background-http versions, then compare its progress, error, and responded callbacks with the simulator. Done means identifying why task events are absent on the affected device and confirming the callbacks behave correctly for the upload.