404 error for thumbnail images

I have the Pretty Photo lightbox disabled in the Woocommerce settings. If I click on a thumbnail to replace the main image, when I click the main image (now replaced by the thumbnail) I get a 404 error instead of linking to the image. The URL on the 404 error is all the URL’s for each image size in the srcset concatenated into one big URL. Can you update the plugin to work correctly with the responsive images of WordPress please? Currently the plugin is useless unless you have the default Woocommerce lighbox enabled.

Example of URL returned:
https://www.mydomain.com/wp-content/uploads/my-image-180×180.jpg%20180w,%20http:/www.mydomain.com/wp-content/uploads/my-image-250×250.jpg%20250w,%20http:/www.mydomain.com/wp-content/uploads/my-image-300×300.jpg%20300w,%20http:/www.mydomain.com/wp-content/uploads/my-image.jpg%20570w

Many thanks