Code not responding

Hi there, hoping to find out why my code is suddenly not responding. I've added additional images to my gallery page and suddenly the images at the bottom are stacked vertically instead of horizontally. I haven't changed the code so I'm confused as to why the formatting is being thrown off. 

Any help/insight is appreciated! 

Page link: https://www.wprojectsyvr.com/artists/russna-kaur/works

This is the code i'm using: 

<style>
.gallery-grid-item img {object-fit: contain !important; object-position: left bottom !important;}
.gallery-caption p {text-align: left;}
.gallery-caption p:first-line {color: black;}
</style>

Hi,

It looks fine to me