Titanium: Crazy "postlayout" event

app.js

var win = Ti.UI.createWindow({
    backgroundColor: '#000',
    layout: 'vertical',
    navBarHidden: true
});

var button = Ti.UI.createButton({
    title: 'Add table'
});
	
win.add(button);
	
var label = Ti.UI.createLabel({ text: 'Something ...', height: Ti.UI.SIZE, width: Ti.UI.FILL });
	
win.add(label);
	
button.addEventListener('postlayout', function(e) {
    Ti.API.info('Button postlayout');
});
	
label.addEventListener('postlayout', function(e) {
    Ti.API.info('Label postlayout');
});
	
win.addEventListener('postlayout', function(e) {
    Ti.API.info('Window postlayout');
});
  
win.open();