Adding after Non-Plugin Images

This plugin seems to be adding a line break <br> after every image in the post if I use the shortcode. See here: http://www.zombtees.com/the-walking-dead-1-comic-book-free/

If I disable the plugin, the <br> disappears. If I remove the shortcode the <br> disappears.

It affects images both above and below the shortcode. It doesn’t display on in the visual editor, only on the front end. And of course, I checked to make sure there was no
in the text editor.

Can you help me?

https://ww.wp.xz.cn/plugins/amazon-product-in-a-post-plugin/