WooCommerce on Mobile Devices - Clicking to View Image Shows Very Undesirable Experience

Greetings Sitepoint! I was hoping you could help me understand what’s going on here.

I have a website where I’m using WordPress/WooCommerce to sell artwork. Here’s the page in question:
https://bailsart.com/product/self-portrait/

The page itself loads fine, but if you click the image to see closer…WOW, it’s an ugly mess and completely unusable. In fact, the image is “smaller” than the original, which completely defeats the purpose of clicking to see closer xD

Even if I switch to the default theme, clicking the image only blows it up to some random point, but doesn’t allow you to move the image around to view sections of it.

Does anyone have any suggestions as to how we can improve this experience? So far, this is unusable :confused:

Thanks!