iOs background service stopping automatically?

Hi! I'm trying to register a background service for an ios app. It's registered and executed well, but it stops automatically after 175 seconds.

This is the js with the service. With 1 second timer it runs 175 times, 2 seconds timer 87, etc...

Test();
var counter = 0;
function Test() {
    setTimeout(Test, 1 * 1000);
    counter++;
    Ti.API.info(counter);
}

And I start it with the following code.

var service = Ti.App.iOS.registerBackgroundService({url:'gpsService.js'});

I've also edited the tiapp.xml ios entries with the follow:

<key>UIBackgroundModes</key>
<array>
<string>location</string>
</array>
<key>UIRequiredDeviceCapabilities</key>
<array>
<string>gps</string>
<string>location-services</string>
</array>

Is there anything else I'm suposed to do? I haven't seen anything else, but as this is the first time I'm fighting with background services, it's possible I'm missing something.

Application type: mobile Titanium SDK: 3.5.1 GA Platform & version: iOS 7.1.2 Device: iPhone 4 Host Operating System: OSX 10.9.5 Titanium Studio: Titanium Studio, build: 3.4.1.201410281727