image_advanced field not hidden

http://take.ms/GB4h1
My code

array(
					'name' => WR_::_( 'Disable title of page' ),
					'id'   => "{$prefix}page_title",
					'type' => 'checkbox',
					'std'  => 1,
				),
array(
					'name'             => WR_::_( 'Background image' ),
					'id'               => "{$prefix}page_title_bg_image",
					'type'             => 'image_advanced',
					'max_file_uploads' => 1,
					'hidden'           => array( 'wr_page_title', '=', 0 )
				),

And related to issue https://support.metabox.io/topic/how-to-make-conditional-logic-for-image-upload/ it does not working, please help me check it

Thank you