Hearts Not Updating on Dynamic Pro Deck Gallery

I’ve connected my Pro Deck Gallery to a dataset to which my members can add images. Today, I noticed that the heart votes aren’t being counted. I went ahead and opened up all the permissions, both in “settings” (read/write) and in the general permissions (changed to “Site Content”). Yet the hearts still won’t show that a user has clicked them.

Any ideas?

To see for yourself, simply click on the heart for any image in “The MEME Master,” and then refresh the page. You will see that the heart won’t show that you’ve clicked it.

Here’s the website: https://hlltrainingcamp.com

Is there a bit of code to identify the heart so I can connect it to a field of its own?