Steps to reproduce the issue

1. Go to https://www.plastic2go.com.au/vented-plastic-fruit-vegetable-crates/
2. Check the top 2 content images' markup
3. Check loading of same images in developer tools network tab

What I expected

I expected the images to have lazy loading markup and to be loaded via the "jquery" initiator.

What happened instead

No lazy loading markup and "(index)" initiator. Two other images on the page have the correct markup and one of them is loaded via lazy loading (the other one is the same as the topmost image).

I thought this might be because the topmost image is included again on the page, so I tested a different image at the top of the page, and the other image was also incorrectly rendered.