Child Themes: Page Template Content is Full Width – Not Boxed
In 1.2.2, we changed the location of the post_class() which inserts WordPress dynamic classes for each post object. This previously set the framework container class on the <section> . With its removal, templates that do not have container set on their wrapper, or which do not have a max-width will not be boxed.
To solve this, either add container to your page template’s section wrapper, or ensure the container class has a max-width. Example:
margin: 0 auto;