@fabrica I don’t think it’s a bug, it’s just the different types of Lightbox choices all act differently. I’ve experimented a lot with displaying masonry blocs. I think each type has its strengths and weakness. Is there one that’s just perfect? I don’t think so. I also like big images and I like the “Full Screen” option. The problem is the portrait images extend too far below the users viewing area and you have to scroll down to see the whole image.
My solution is I ended up using smaller images. I use landscape images at 1200 px long edge and portrait images at 800 px long edge. Set the Lightbox to full screen and then when you click on the images the landscape photos are a nice size (with some extra screen on each side) and the portrait images fill the screen and you don’t have to scroll. I don’t think this is perfect, but for me it’s the best for displaying a Masonry Lightbox gallery.
Here’s an example of a full-screen masonry Lightbox on my blog. You could also set the bloc not to be full screen and it would scale.
Hope this helps.