Bug in display when zoomed image has different aspect ratio than small image

I’m using a plugin that resizes and fills in images with white space in order to make them square. But because WP Image Zoom uses the original image for zoom, this makes for a strange effect. See screenshot: https://i.imgur.com/HU26qDB.png

Now, I get why it’s happening, but I’m wondering if there’s anything I can do about it? Or better yet, if you could update the plugin to take the image aspect ratio into account?