Last images in page doesn't load

For some reason, the last images in a page don’t load when using BJ Lazy Load. All other images load fine but only the last row doesn’t. I have to increase the page’s bottom margin to something like 500px before I have enough room to scroll down and have the image lazy load, is this a bug or some other method I can fix this?

Thanks

https://www.ads-software.com/extend/plugins/bj-lazy-load/