The Magazine Columns is a known problematic plugin.
Plugin Name: Magazine Columns
Plugin Version: 1.0.4
Plugins Affected: All of our plugins.
Diagnosis: Doesn’t parse shortcodes.
The Magazine Columns plugin works well in splitting the content of WordPress posts/pages but it doesn’t parse shortcodes inside that content after splitting it, leaving behind shortcodes in the post/page and not the actual shortcode output.