Contact API and iOS

I just noticed that my application is restarting every time when I go to device settings and there in Privacy -> Contacts allow/disallow it to use Contacts. This is strange behaviour for me but it is maybe default or something else is happening that I am not aware of? This is happening both on device and in simulator. Bellow is the mockup peace of code:

(function() {
    var self = Ti.UI.createWindow({
        backgroundColor:'#fff'
    });
 
    alert('Application started.');
 
    var button = Ti.UI.createButton({
        title : 'Save to Contacts',
        style : Ti.UI.iPhone.SystemButtonStyle.BORDERED
    });
 
    self.add(button);
 
    //Add behavior for UI
    button.addEventListener('click', function(e) {
        Ti.Contacts.requestAuthorization(function(e) {
            if (Ti.Contacts.contactsAuthorization == Ti.Contacts.AUTHORIZATION_AUTHORIZED) {
                saveContact('Mladen', 'Mijatovic', '01010101', '02020202', 'dummy@something.com');
            } else {
                addressBookDisallowed();
            }
        });
    });
 
    self.open();
})();
 
function saveContact(firstName, lastName, mobilePhone, officePhone, email) {
    //query contacts to see if it is saved
    var person = Ti.Contacts.getPeopleWithName(firstName + ' ' + lastName);
    if (person.length > 0) {
        Ti.Contacts.removePerson(person[0]);
        Ti.Contacts.save();
    }
    Ti.Contacts.createPerson({
        firstName : firstName,
        lastName : lastName,
 
        phone : {
            mobile : [mobilePhone],
            work : [officePhone]
        },
        email : {
            work : [email]
        }
    });
 
    Ti.UI.createAlertDialog({
        title : 'Success',
        message : 'Contact saved.'
    }).show();
}
 
function addressBookDisallowed() {
    Ti.UI.createAlertDialog({
        title : 'Error',
        message : 'No permission to write in Contacts.'
    }).show();
}