moveTo within onLeave

Hi Alvaro,

since v2.8.1 it seems the method "moveTo" is not working within callback "onLeave".

``` javascript
onLeave: function(index, nextIndex, direction){
var leavingSection = $(this);
if(index == 2 && direction == 'down'){
$.fn.fullpage.moveTo(4);
}
}
```

With above code nothing happens in section 2, cannot scroll down to section 3 or 4...
Am I missing something or is this somehow a bug?