Hi @AdrianRayco, this happens in the designer because of the top margin applied to your sections:
When applying top margin to a section under the body, the amount of the top margin will not be scrollable in the designer but will be on the published site.
I would actually suggest to use top paddings instead of top margins.
Our team is working to either block the ability to add this kind margin or add a warning, when there is an update, I will post here.