Hi @sneakyrock,
I do see the problem on your site. In this case, can you try disabling the lazyload feature of the plugin to see if you are having this exact same issue with the native lazy loading? Alternatively you can also try enabling this option: https://i.imgur.com/frthQMI.jpeg to see if that helps or not.
Also, if you have access to the Perfmatters plugin, can you try the lazy loading feature of that plugin as it has the threshold option?
But first check if this issue persist with the native lazy loading or not.