Display Conditions changes layout when item is hidden

Hey all, I am having issues when I apply a display condition to a text header as example, that when I hide it on all pages but the main page, it makes the navigations headers increase in size:

Page it shows on:

Any other page where it is hidden:

You can see it in action at https://www.sketchedneo.com

The page I need help with: [log in to see the link]