I stripped all the custom CSS and was still having issues. The theme we’re using has updated from using plain shortcode to integrating Elementor and I’m thinking this might be a conflict on their end. I get this error when loading a page with tables in Elementor: DataTables warning: table id=tablepress-9 – Cannot reinitialise DataTable. For more information about this error, please see https://datatables.net/tn/3
Older, plain shortcode pages that have not been editing using Elementor are displaying responsive tables as expected. I will take this up with the theme developers. Thanks for your time!