Fix for Insert PHP Code Snippet output buffer issue

fix-insert-php-code-snippet.php

<?php
/*
Plugin Name: Fix: Insert PHP Code Snippet output buffer issue
Author: nextendweb
Version: 1.0.0
Requires at least: 4.1
Tested up to: 4.9
License: GPLv2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
*/
add_action('plugins_loaded', 'fix_insert_php_code_snippet');

function fix_insert_php_code_snippet() {
    if (function_exists('xyz_ips_display_content')) {
        add_shortcode('xyz-ips', 'fix_xyz_ips_display_content');
    }
}

function fix_xyz_ips_display_content($xyz_snippet_name) {
    ob_start();

    return xyz_ips_display_content($xyz_snippet_name);
}

https://wordpress.org/plugins/insert-php-code-snippet/

https://wordpress.org/support/topic/plugin-breaks-output-buffers-started-in-other-plugins-and-themes/