I' sorry but the landing page shows a product that is not published. But I will try to describe the problem as best as possible.
It's looks like some animations play in the same time. A lot of tween is scrolltrigger. Look on apple page https://www.apple.com/iphone-14-pro/.
For example when I scroll down to the caption - "Pro. Beyond." and refresh. On my site, another animation would also appear at the same time, such as the video at the beginning or something below. I'll try to show you the code for a horizontal animation soon, which usually overlaps another.