Content from posts overflowing unexpectedly.

Hi guys, this is my first time posting here, and I need help understanding why the content of posts on my site will overflow randomly. I’m using a template that I made, so it could possibly be an error on my part — I just can’t find what that would be. Also note that when zooming in and out of the webpage, it will fix itself. Is there a jQuery code I can use to fix this?
The left column is a div#body with a width of 63%, and the sidebar is div#sidebar with a width of 30%.
Upon refreshing the page, the content more likely overflows. Any ideas?

Pics:
What it should look like: https://gyazo.com/0bac53e81706405d60671418472eb4ee
What it sometimes looks like: https://gyazo.com/031d1a02b90362ba494df222bed9cf1b

Test it yourself:
website: https://onlinedirectoriesllc.com/edgewraps