Square Tiles not displaying correctly

All was good in developing my website, until now. I was checking my site stats this morning when I noticed all my galleries using the square tiles format no longer display correctly. There have been no updates since the night before, so I’m not sure why they changed. On rare occasions when I refresh the page they’ll actually display correctly, which makes this somewhat random event even more frustrating. Any help would be greatly appreciated.

https://pjkelley.freeadepts.com/project/breadth/

p.s. My tiled mosaic galleries have not been affected.

https://www.ads-software.com/plugins/jetpack/