1. A similar issue was resolved in the latest version that was released today, though it didn’t happen only at widths near 990px. There are no devices with a width of 990px, you should check if it looks properly on 960px and 1024px widths instead.
2. The page generates a fatal error that prevents the page’s footer (where the scripts are located) to load. You need to enable debug mode for the error to display on screen.