Sidebar and Footer dissappears

On the free version as well as the premium version (2 different domains) I continue to see an issue where all of the content in the right sidebar randomly does not display when navigating from page to page. Scroll down and the footer is no longer there either. Really annoying especially from a paid for premium theme. Happens both on Chrome and firefox so not a browser issue. Also sometimes images embedded into pages or post dont show. Just a blank spot where it should be.

Can someone please help?