Lazy Load images images doesn't appear on the wordpress admin panel

I have a wordpress travel blog and each articles consist of many photos. Therefore, I added the Lazy Load jquery plugin code at the page bottom without a plugin. It just call to js file and $(selector).lazyload();

The plugin works great on front of page. But, I cant preview the images on admin panel. Because the image code like <img data-original="IMGURL" />

How can I see normally the photos in tinymce editor?

Thanks for help.