It looks like this might be due to the scroll interaction you have on the hero section. Can you try disabling this, re-publish, and see if your issue persists? Obviously, we want to try and retain your interaction, but this will at least tell us exactly where to start.
Interesting. I can see that if I disable the transform when inspecting the element on the live site, the white space is immediately gone (of course, until I scroll again, because the values are re-written in real time).
Something to note – I was able to recreate this issue in the designer by switching to the largest breakpoint and enabling live preview on the interaction (all the way at the bottom once you’re inside the interaction editor)
I’d recommend adjusting your interaction until you aren’t seeing the white space while at the lowest scroll level, and see if that helps.