Hi,
I checked the situation but I don't see the problem.
When I look at the HTML of the pinterest button, I can see that HTML:
<a href="//pinterest.com/pin/create/button/?url=https%3A%2F%2Freddustsnow.com%2Frivers-waterways%2Fwall-art-photography%2Fcadell-s-fault&media=https%3A%2F%2Freddustsnow.com%2Fimages%2Fcom_hikashop%2Fupload%2F%2Faustralia%2Frivers-waterways%2Fmurray-darling-rivers-47.jpg&description=Cadell%27s%20Fault%20visiable%20beside%20the%20Gulpa%20Creek%2C%20an%20anabranch%20of%20the%20Murray%20River%2C%20Mathoura%2C%20NSW%2C%20Australia" class="pin-it-button" count-layout="none"><img border="0" src="//assets.pinterest.com/images/PinExt.png" title="Pin It" /></a>
That's basically the same I would get if I was to generate the button with pinterest's widget builder tool:
developers.pinterest.com/tools/widget-bu...om=&language=default
And when I try to use the button generated by the builder tool itself, I get that same issue.
So that means the problem is not in how HikaShop generates the widget button for pinterest.
It's either coming from how the server sends the image to pinterest or a bug on pinterest's end when retrieving the image.
I would recommend you report the issue to pinterest:
docs.google.com/forms/d/e/1FAIpQLSdrfZ7b...P_mHl54nYsw/viewform