Editor block becomes blank when switching styles in edit mode (ACF 5.8.1)

As stated in the title, when I'm in edit mode with form inputs, trying to switch between custom block styles, the content of the block disappears.

I'm using the latest Safari on MacOS.

The code:

/**
 * Test ACF blocks in 5.8
 */

function my_acf_block_render_callback() {
	$settings = get_field( 'my-settings' );
	echo 'Field stores: ' . var_dump( $settings['url'] );
}

add_action( 'acf/init', 'my_acf_blocks_init' );
function my_acf_blocks_init() {
	/**
	 * Register block
	 */
	acf_register_block_type( array(
		'name'            => 'my',
		'title'           => __( 'My Test Block', 'my-acf' ),
		'description'     => __( 'A block for entering a link name and a custom URL.', 'my-acf' ),
		'render_callback' => 'my_acf_block_render_callback',
		'category'        => 'formatting',
		'icon'            => 'external',
		'keywords'        => array(),
		'supports'        => array( 'align' => false ),
		'mode'            => 'edit',
		'styles'          => array(
			array( 'name' => 'normal', 'label' => __( 'Normal', 'my-acf' ), 'isDefault' => true ),
			array( 'name' => 'fancy', 'label' => __( 'Fancy', 'my-acf' ) ),
		),
	) );

	/**
	 * Define block fields
	 */
	acf_add_local_field_group( array(
		'key' => "group_my",
		'title' => __( 'Block :: My Test Block', 'my-acf' ),
		'location' => array(
			array(
				array(
					'param' => 'block',
					'operator' => '==',
					'value' => 'acf/my',
				),
			),
		),
		'fields' => array(
			array(
				'key' => "field_my-settings",
				'label' => false,
				'name' => "my-settings",
				'type' => 'group',
				'layout' => 'block',
				'sub_fields' => array(
					array(
						'key' => "field_my-settings-url",
						'label' => __( 'URL', 'sai-acf' ),
						'name' => 'url',
						'type' => 'url',
						'placeholder' => 'https://',
					),
				),
			), // EOF settings
		),
	) );
}

Reproduce the issue in Safari on macOS using the provided ACF 5.8.1 block registration, edit-mode form fields, and Normal/Fancy styles. Trace the block editor behavior when switching styles; done means the block content and form inputs remain visible after changing styles.