Expected Behavior:

When saving a post, the contents of the field are saved.

Actual Behavior:

The changes are not saved. They're only saved when using the tab "text".

Steps to reproduce

I have confirmed I can reproduce this issue on the trunk branch: ✔️

1. Enable CMB2 & Gutemberg

2. Add wysiwyg field

3. Edit a post and add content to the field wysiwyg 'Content', on the tab "Visual".

4. Refresh and notice that the content is not saved.

5. Edit a post and add content to the field wysiwyg 'Content', on the tab "Text".

6. Refresh and notice that the content is saved.

Versions

• CMB2 : 2.4.2
• Gutenberg : 3.4.0
• WP : 4.9.7

CMB2 Field Registration Code:

add_action( 'cmb2_admin_init', 'yourprefix_register_demo_metabox' );
function yourprefix_register_demo_metabox() {

		$prefix = '_our_info_';

		$cmb = new_cmb2_box( array(
			'id'            => 'test_id',
			'title'         => 'Details',
			'object_types'  => array( 'post' ),
			'context'       => 'normal',
			'priority'      => 'high',
			'show_names'    => true,
		) );

		$cmb->add_field( array(
			'name'        => __( 'Content', 'our-post-types' ),
			'description' => __( 'Has limit space.', 'our-post-types' ),
			'id'          => $prefix . 'description',
			'type'        => 'wysiwyg',
		) );

	// Additional fields...
}