WYSIWYG Editor Not Working Correctly

I’ve registered a WYSIWYG metabox on a page post type but the visual editor isn’t working. If I swap to the “text” tab, I can type in there and the details are saved, but nothing is shown in the visual editor section.

Here is the code I’m using to register the metaboxes.

$meta_boxes[] = array(
            'title' => 'Pedestal Details',
            'id'=>'pedestal_details',
            'post_types' => 'page',
            'fields' => array(
                array(
                    'name'=>'Select Image Map',
                    'id'=>'image_map',
                    'type'=>'select',
                    'options'=>array(
                        'test'=> 'Test'
                    )
                ),
                array(
                    'name'=>'Hotspot Details',
                    'id'=>'hotspots',
                    'type'=>'group',
                    'clone'=>true,
                    'sort_clone'=>true,
                    'add_button'=>'Add a Hotspot',
                    'fields'=>array(
                        array(
                            'name'=>'Hotspot Title',
                            'id'=>'hotspot_title',
                            'type'=>'text'
                        ),
                        array(
                            'name'=>'Hotspot Content',
                            'id'=>'hotspot_content',
                            'type'=>'wysiwyg'
                        ),
                        array(
                            'name'=>'Hotspot Image',
                            'id'=>'hotspot_image',
                            'type'=>'image_advanced',
                            'multiple'=>false
                        ),
                        array(
                            'name'=>'Hotspot Products',
                            'id'=>'hotspot_products',
                            'type'=>'post',
                            'post_type'=>'product',
                            'clone' => true,
                            'add_button'=>'Add a product'
                        )
                    )
                ),
                array(
                    'name'=>'Select a download',
                    'id'=>'pedestal_downloads',
                    'type'=>'post',
                    'post_type'=>'download',
                    'clone' => true
                )
            )
        );

What have I missed?