I am using sections, and when scaling the page to smaller screen sizes the headers and contents go outside the boundaries of the the sections. Have a look at an iPhone screenshot here:
You see there is spacing to the right of the screen (the menu bar should span all the way to the right edge of the screen), and the text in the section with the blue background goes outside its bounds.
That’s the free theme version – what about GP Premium/the Sections add-on? You can check by going to “Plugins” in your Dashboard and finding the plugin, it will have a version number with it π