On page refresh we see all big images in carousel

Hi, i use su_carousel.

We are having an issue during the on load with the carousel,

it shows all of the big images as a vertical list when refreshing the page only in the loading time. then resized to thumbnails and everything is fine.

During loading it shows so ugly fraction.

For example, Among 5 images, if 3 image set to be visible in carousel it shows all of the big 5 images During loading time, then after finishing loading it shows 3 images as expected and everyting looks ok.

What’s wrong with it? I hope, that is solvable…
Thank you.

https://wordpress.org/plugins/shortcodes-ultimate/