Why is the screen sticking?

Question

HTML

From primer in dock https://getbootstrap.com/docs/3.3/javascript/#carousel
By clicking on

<a class="left carousel-control" href="#carousel-example-generic" role="button" data-slide="prev">

or another anchor, the slide flips and the screen does not jump, but on the site, local, when you click on the arrow, the screen moves up or down so that the carousel is in the center of the screen.
Before pressing

After

The screen slid down so that the picture leveled out and it was completely visible, you can’t do this, because the screen twitches sharply, the sensations are negative.

function schedule() {
  if ( inProgress ) {
    if ( document.hidden === false && window.requestAnimationFrame ) {
      window.requestAnimationFrame( schedule );
    } else {
      window.setTimeout( schedule, jQuery.fx.interval );
    }

    jQuery.fx.tick();
  }
}

There is then a burn

Answer 1

"clicks" because it should be so when you click on the anchor link.
try adding onclick="return false"

<a class="left carousel-control" href="#carousel-example-generic" role="button" data-slide="prev" onclick="return false">