Custom style_formats is not working when Jetpack is activated

I have a custom style formats on my TMCEA and it was working perfect. After activating Jetpack on my website my styles have gone and it’s only showing 3 styles that seems to be from Jetpack form.

function my_tiny_mce( $init ) {

	// Create array of new styles
	$style_formats = array(

		array(
			'title' => 'Font Light',
			'inline' => 'span',
			'classes' => 'light',
		),
		array(
			'title' => 'Font Medium',
			'inline' => 'span',
			'classes' => 'medium',
		),
		array(
			'title' => 'Cor Lilas',
			'inline' => 'span',
			'classes' => 'lilas',
		),
		array(
			'title' => 'Citacao esquerda',
			'inline' => 'blockquote',
			'classes' => 'citacao_esquerda',
		),
		array(
			'title' => 'Citacao direita',
			'inline' => 'blockquote',
			'classes' => 'citacao_direita',
		),
		array(
			'title' => 'Citacao central',
			'inline' => 'blockquote',
			'classes' => 'citacao_central',
		),
		array(
			'title' => 'Letra Grande',
			'inline' => 'span',
			'classes' => 'letragrande',
		),

	);

	$init[ 'style_formats' ] = json_encode( $style_formats );

	return $init;
}
add_filter( 'tiny_mce_before_init', 'my_tiny_mce' );

Any thoughts on this bug?