Sidebar pushed to bottom of page

I converted the page from the classic editor to the box editor. Now the sidebar is at the bottom of the page. As a result I have had to go ‘full width’ page, which interestingly was not working properly until now. But the format is different than all other pages, so need to resolve the main sidebar being pushed to the bottom of the page/ after the pages text has finished. Suggestions?

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