Fullwidth slider causes content load delay

Hi there,
when I reload my website only the fullwidth slider in the header appears. The rest of the content sections beneath it have a huge margin and only jump up to where they belong when the slider changes from the first to the second slide. It looks like some sort of animation, but those are all deactivated.
Putting the slider under the content doesn’t cause any margins for the content sections.

I use the latest Enfold and WP versions. All caching plugins are deactivated.

Any ideas what might cause this are very appreciated?

Thanks!
Philipp