Hi there,
Thank you for the information I did test the case by adding the same shortcode on a newly created page called a test page. I just added a section with two columns and added the shortcode in a smaller column. The result was the same and it was not showing correctly.
I also try to add the same shortcode in a full with fashion and it works, I tested that on my local installation and the result was the same.
The problem is also visible when I change the theme from X to the default WordPress theme, so this is not a conflict between the plugin and theme and is something related to plug-in itself.
I added this to our issue tracker. Please kindly consider that the MEC is a third-party plugin that we bundled in our theme, we cannot change the code base of it, our Development Team will contact the plugin developers and add this as a bug report to their system.
Thank you.