Hi there, thanks for reaching out!
Do you mind sharing your website share link with us. This looks like the HTML height is actually being set to 48px after content has loaded which is odd, a look inside the design tool may help.
It could also be a browser extension causing this if this doesn’t happen to you inside the design tool. Does this still occur in incognito mode? Do you mind providing a screenshot of the area with the extra padding?
Thanks!