Save Wysiwyg content as post_content

I have this set up, and in the WYSIWYG editor for the content field I can set a link on some text, but after saving the post the link is removed. What am I missing?

You had me add a custom html field to the Field Group with the following:

<style>#wp-content-editor-tools{background:none;padding-top:0;}</style>'

the full code for the Field Group is:

<?php
add_filter( 'rwmb_meta_boxes', 'your_prefix_register_meta_boxes' );

function your_prefix_register_meta_boxes( $meta_boxes ) {
    $prefix = '';

    $meta_boxes[] = array (
        'title' => esc_html__( 'Code Snippet Before', 'text-domain' ),
        'id' => 'code-snippet-before',
        'post_types' => array(
            0 => 'code-snippet',
        ),
        'context' => 'after_title',
        'priority' => 'high',
        'fields' => array(
            array (
                'id' => $prefix . 'content',
                'name' => esc_html__( 'Reason for snippet', 'text-domain' ),
                'type' => 'wysiwyg',
                'desc' => '###Why did I need to use this?
This field is also used as the Excerpt for the post.###',
                'class' => 'reason-for-snippet',
            ),
            array (
                'id' => $prefix . 'what-it-does',
                'name' => esc_html__( 'What It Does', 'text-domain' ),
                'type' => 'wysiwyg',
            ),
            array (
                'id' => $prefix . 'actual-code-snippet',
                'name' => esc_html__( 'Actual Code Snippet', 'text-domain' ),
                'type' => 'wysiwyg',
                'sanitize_callback' => 'none',
            ),
            array (
                'id' => $prefix . 'before-the-snippet',
                'type' => 'single_image',
                'name' => esc_html__( 'Before the snippet', 'text-domain' ),
            ),
            array (
                'id' => $prefix . 'after-the-snippet',
                'type' => 'single_image',
                'name' => esc_html__( 'After the snippet', 'text-domain' ),
            ),
            array (
                'id' => $prefix . 'custom_html_sbvmvz193m',
                'type' => 'custom_html',
                'std' => '<style>#wp-content-editor-tools{background:none;padding-top:0;}</style>\'',
            ),
        ),
        'style' => 'seamless',
    );

    return $meta_boxes;
}