We checked the above issue in our local server and it working fine.
As we have individual options for post/page layout might be you selected layout from there. Please go to edit mode of your static blog page for example Home. There you will see Sidebar Layout tab from there choose no sidebar and update your page.
Let us know this helps you or not? If your issue persists again then please allow us temporary login access details of your site. We will fix it. and don’t forget to mark as private while providing access details.