Hi Eugene, I would like to react to this post because I experience the same problem. I tried disabling other plugins but that didn’t help. Images are stacked on one side at the bottom of the page. Otherwise I really like the Stratum Masonry gallery so I hope there is a way to resolve this problem. Here is one of the pages, where the problem occurs: https://urbanexplorers.eu/chateau-wolfenstein/
I also tried to rearrange the images and then inserted the new gallery, but with the same results. I hope you can help me, thank you and kind regards,
Casper