I was testing this out on one of my test sites and I tried putting two galleries on a page. The first gallery works correctly, but the second one won’t open the lightbox, it just goes straight to the image. Here’s the link: https://acquirevisualclient.com/wordpress/about-us/
The shortcode being used is
[gallery link="file" columns="9" ids="677,682,674,683,673,684"]
[gallery link="file" columns="9" ids="661,694,660,695,696,659"]