[TIMOB-20423] iOS: KeyboardToolbar is not working well when there are more then one textfield

var win = Titanium.UI.createWindow({
    backgroundColor: 'white',
});
var view = Ti.UI.createView({
	top: 0,
});

// Textfield 1
var textfield1 = Ti.UI.createTextField({
	top: 20,
	hintText: "First Name",
});
view.add(textfield1);

// Textfield 2
var textfield2 = Ti.UI.createTextField({
	top: 100,
	hintText: "Second Name",
});
view.add(textfield2);

// Tool Button
var next = Titanium.UI.createButton({
	title: 'Next',
});
var prev = Ti.UI.createButton({
	title: 'Previous',
});
var done = Ti.UI.createButton({
	title: 'Done',
});
var flexSpace = Titanium.UI.createButton({
	systemButton: Titanium.UI.iPhone.SystemButton.FLEXIBLE_SPACE
});

// create tool bar and add it into textfield
var toolbar1 = Ti.UI.iOS.createToolbar({
	items: [next, flexSpace, done],
});
var toolbar2 = Ti.UI.iOS.createToolbar({
	items: [prev, next, flexSpace, done],
});
textfield1.keyboardToolbar = toolbar1;
textfield2.keyboardToolbar = toolbar2;

win.add(view);

win.open();