[TIMOB-2647] iOS: view.animate() callback not always invoked

I got the following code:

var slide_out = Ti.UI.createAnimation({ bottom:-251 }); bday_pv.animate(slide_out, function() {

   log('>> never called');

);

the callback is never being called. Changing the code to

bday_pv.animate({ bottom:-251 }, function() {

   log('>> gotcha');

});

makes it work.