websquaredbeginner

Hi all . Ive added scrolling blocks on the trial site I'm doing for a family member and they work very well on desktop and mobile on the Sqspace site. However, when I share a preview of the site to those interested the scrolling blocks viewed on the mobile (iphones 10 upwards) show the blocks running at crawling , jittery speed, whilst everything else runs well including video content. Any advice very gratefully received