Resizing browser with product details page causes product image to disappear

[davza]

If you open the product page with your browser almost full screen, then resize the width of the browser until it is less than about 730px, the product image changes to the image loading spinner which never loads anything unless you resize the browser some more.

Normal product page:

Product image not loading:

Product page, resized back, before image "reloaded" (The image doesn't load until the page is resized a little more)