Invisible spacing between sections

When scrolling from my landing section to the following card section, the section stops short of filling the entire page. There is about a 20% space that sticks to the top of the page and only disappears when the card scroll animations have played-through.
(In the image attached, I’ve illustrated the area with a yellow rectangle)

Could anyone let me know what I am missing to make the card section fill the entire viewport height?

Best regards,

Robert


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