.hidden not removed on background images

My background images are never fading in because it looks like

.lazy-hidden {
    opacity: 0;
}

is never removed. The weird thing is that the image flashes on and then disappears. My code inside the template is:

<section id="inner" data-bg="<?php the_post_thumbnail_url('large'); ?>" style="background: url('<?php echo $thumb['0'];?>');">	
		<div class="inner-intro">
		   <h1><?php the_title();?></h1>
		   <?php the_content();?>
	        </div><!--end inner intro-->		
</section>

I do have backgrounds enabled in the plugin as well as post thumbnails. Any help is greatly appreciated. Thanks!

• This topic was modified 7 years, 10 months ago by lotsamottsa.