Wordpress shortcodes will sometimes output empty <p> tags. This plugin will remove them. Source of original code: https://thomasgriffin.io/remove-empty-paragraph-tags-shortcodes-wordpress/

remove-empty-p.php

<?php

/*
Plugin Name: Shortcode P-Fixer
Description: Remove empty paragraphs from shortcode output.
*/

/* Original Code from Thomas Griffin
/* https://thomasgriffin.io/remove-empty-paragraph-tags-shortcodes-wordpress/
*/

add_filter( 'the_content', 'tgm_io_shortcode_empty_paragraph_fix' );

/**
 * Filters the content to remove any extra paragraph or break tags
 * caused by shortcodes.
 *
 * @since 1.0.0
 *
 * @param string $content  String of HTML content.
 * @return string $content Amended string of HTML content.
 */
function tgm_io_shortcode_empty_paragraph_fix( $content ) {
 
    $array = array(
        '<p>['    => '[',
        ']</p>'   => ']',
        ']<br />' => ']'
    );
    return strtr( $content, $array );
 
}

?>