Advanced Slider Loading Problem

Hi I downloaded the Advanced Slider php with this code: <?php echo do_shortcode( ‘[advps-slideshow optset=”1″]’ ); ?>

However, when I load my homepage there’s a glitch where the slider will show for 1 second then shift down to my content and within another 1 second shift back to the slider.

Can someone assist me if there’s anything I can add on or take away from the php file so when I click my homepage it will show the slider without moving around my site?

My website — https://www.felinecreatures.com

Thanks!

Lena