Image Carousel Custom Links Showing As Hash

I’m using the wp image carousel (owl carousel), which is working as expected, however, I am trying to add custom links to each image in the carousel. When I load a page that contains the carousel the links (hrefs) on the images show as a plethora of numbers, letters and special characters – example below;

<div class="owl-carousel-item-inner">
	<a href="#E-8_aHR0cHMlM0ElMkYlMkZ3d3cucm9vb3N0LmNvLnVrJTJGZ2FyZGVucy1zYWxlJTJG">
		<img width="150" height="150" src="img_src" class="attachment-thumbnail rooost-lazy-load rooost-lazy-fade rooost-loaded" alt="Rattan Furniture" srcset="img_src" sizes="(max-width: 150px) 100vw, 150px" data-rooost-src="img_src">									
    </a>
</div>

I’ve been banging my head against a wall now for about 5 hours, but can’t work out what’s going on. Any help would be greatly appreciated.

Thanks
james