Thanks for asking.
I can see the spacing between articles. Unfortunately, it's difficult for us to provide support for issue coming because of 3rd party plugins. As you are using A3 lazy load which is a 3rd party plugin. In that regards it fall outside the scope of support we can offer.
Having said that, I see you are using WP Fastest Cache. Please try clearing cache and see how it goes. In case problem is still there, I suggest you to look for some other lazy load plugin. You can look at following Google search result.