Multiple masonry galleries increases height and requires scrolling to load

I have 5 masonry galleries on one page separated by tabs. I got around the scrolling to load issues by using this code I found here:

.av-masonry-entry { 
opacity: 1; 
visibility: visible; 
}

However the issue I have is that every additional masonry gallery increases in height from the top of the page for some reason and I don’t know why. Any help is much appreciated!