We've just released a new update (X 6.3.2 and Cornerstone 3.3.2) please update to that version.
Updating Your Themes and Plugins
Remember to clear all your caching features (plugin, server-side, CDN, and browser's cache) after updating so that the code from the latest release is always in use. This will help you to avoid any potential errors.
And please use the Classic Essential Grid element when adding Essential Grid on the page instead of using the shortcode.
Hope it helps,