Case 4020: IOS Background Fetch is not working

app.js

var url = "http://api.geonames.org/citiesJSON?north=44.1&south=-9.9&east=-22.4&west=55.2&lang=de&username=demo";

var win = Ti.UI.createWindow({
	backgroundColor : 'white',
	layout: 'vertical'
});

var b1 = Ti.UI.createButton({
	title : 'Service Start',
	top : 50
});
win.add(b1);
b1.addEventListener("click", doIOSBackGroundSessionFetch);

var b2 = Ti.UI.createButton({
	title : 'XHR Start',
	top : 50
});
win.add(b2);
b2.addEventListener("click", doHttpClientFetch);

win.open();

function doIOSBackGroundSessionFetch() {
	var urlSession = require("com.appcelerator.urlSession");
	// Create a session configuration
	// The string parameter is an arbitrary string used to identify the session in events
	var sessionConfig = urlSession.createURLSessionBackgroundConfiguration("com.test.background");
	// Create a session
	var session = urlSession.createURLSession(sessionConfig);
	// Create a background download task to get the data with the URL
	urlSession.backgroundDownloadTaskWithURL(session, url);

	Ti.App.iOS.addEventListener("downloadcompleted", function(e) {
		Ti.API.info('e' + JSON.stringify(e));
		alert("<<<download completed>>> " + JSON.stringify(e));
		// Invalidate the session and cancel current session tasks
		urlSession.invalidateAndCancel(session);
	});

	Ti.App.iOS.addEventListener('sessioncompleted', function(event) {
		Ti.API.info("sessioncompleted " + JSON.stringify(event));
		if (event.success) {
			Ti.API.info("Downloads completed successfully.");
		}
		Ti.API.info("Download task :" + event.taskIdentifier + " completed, success ? : " + event.success);
	});
} 


function doHttpClientFetch() {
	var xhr = Ti.Network.createHTTPClient({
		onload : function() {
			Ti.API.debug(this.responseText);
			alert(JSON.parse(this.responseText));
		},
		onerror : function(e) {
			Ti.API.debug("STATUS: " + this.status);
			Ti.API.debug("TEXT:   " + this.responseText);
			Ti.API.debug("ERROR:  " + e.error);
			alert('There was an error retrieving the remote data. Try again.');
		},
		timeout : 5000
	});

	xhr.open("GET", url);
	xhr.send();
}