Displaying images from other post's galleries

Easy Fancybox is appending images from the next post’s gallery to the end of each gallery when in slideshow mode. This only happens on the home page. It is not happening for single posts.

Deactivating the other plugins does not fix the problem.
Go to https://www.sheilabergman.net/ and scroll down to the post “From Home to Alexandria” and click on a gallery thumbnail to start the slideshow. You will see that the slideshow has many more images than the three gallery thumbnails.

Using Fancybox version 1.5.5

Any thoughts? Thanks.

https://www.ads-software.com/plugins/easy-fancybox/