fullWidthSlides1 Function changeSlide() dosn't work

Hi! How are you?

A few days ago it worked perfect for me but suddenly it began to fail and the following

$w.onReady(function () {
     $w("#fullWidthSlides1").changeSlide(4).then(() => 
          console.log("current index: " + $w("#fullWidthSlides1").currentIndex);

It’s really weird. The browser console writes the message “current index: 4” and the scroll adjusts to the position of the element “header1” but does not change to the slide 4

Here you have the browser console result:

The “fullWidthSlides1” keep the slide in “0”

can you help me?