Plugin not working when page has infinite scroll

I am using infinite scroll to load posts in a grid layout. Each post title currently is suppose to load the post in a modal. This works fine for the 6 posts that load initially. But when I scroll down and the other posts are loaded those additional posts do not open in a modal, but instead in the same window. Sll posts still show the class being “lbp_secondary”, the first 6 that load initially AND the others, but only the first 6 will open in a modal. If I add pagination, then those on the other pages will load just fine, but I need infinite scrolling… Any ideas? I can give the URL is anyone is interested.

https://ww.wp.xz.cn/plugins/lightbox-plus/