Trouble with ghost-images on page load

Hi community,

I´ve got a huge problem with my images on the live-site.
Site visitors are reporting me, that there are sometimes “blending-issues” or “ghost-images” on the hero-section of the site.
Sometimes the images are dublicated and sometimes the images have some glitchy/blending effects on it, as you can see on the screenshots (blue marked).
Does anyone know where this is comeing from?

Here is my site Read-Only: LINK
(how to share your site Read-Only link)