Pinterest not finding my images

Hi there

Who can help me with this….

Since upgrading to 4.5 I’ve noticed some issues with Pinterest. My blog is very image focused with Pinterest being a major source of traffic so this poses quite a problem for me.
Basically, the Pin It bookmarklet is no longer recognising most of my images so I, and others, can’t pin specific images from my site. I have tested in Chrome, Firefox, Safari and IE. All of which present the same issue. Have also tried on my husband’s laptop with the same result.
Based on what I have noticed being pinned from my site since the upgrade, others are also experiencing this problem, though not everyone.

Here’s an example of the situation…

In this post there are 14 “pinnable” images. When I hit the Pinterest bookmarklet only two images from the post are returned, along with one image replaced by alt text and several images from my sidebar and “Related Posts”.

On inspection of one of the returned images from the post, I get this code:

<img class="size-full wp-image-11485 aligncenter" src="https://thepaintedhive.net/wp-content/uploads/2015/01/Landscape-Pier-After.jpg" alt="Pier After" width="565" height="340">

Seems basic enough.

On inspection of one of the un-returned images, I get this much longer code:

<img class="size-full wp-image-11411 aligncenter" src="https://thepaintedhive.net/wp-content/uploads/2015/01/Before.jpg" alt="Animal Art Before" width="565" height="375" srcset="https://thepaintedhive.net/wp-content/uploads/2015/01/Before.jpg 565w, https://thepaintedhive.net/wp-content/uploads/2015/01/Before-300x199.jpg 300w, https://thepaintedhive.net/wp-content/uploads/2015/01/Before-450x299.jpg 450w, https://thepaintedhive.net/wp-content/uploads/2015/01/Before-250x166.jpg 250w, https://thepaintedhive.net/wp-content/uploads/2015/01/Before-36x24.jpg 36w, https://thepaintedhive.net/wp-content/uploads/2015/01/Before-90x60.jpg 90w, https://thepaintedhive.net/wp-content/uploads/2015/01/Before-150x100.jpg 150w, https://thepaintedhive.net/wp-content/uploads/2015/01/Before-32x21.jpg 32w" sizes="(max-width: 565px) 100vw, 565px">

Okay, where did all this come from? I’m assuming all these new sizes (srcset) have something to do with the problem. Maybe Pinterest isn’t reading the size it needs?

I have no idea why it only seems to be effecting certain images or why some people still seem to be able to pin the images I, and others, can not.

Any help or ideas much appreciated (please bear in mind I am a novice).

Cheers