WordPress Sumo Plugin not showing all images on clicking pinterest icon

I am using SUMOMME WordPress Plugin for social sharing on WordPress Site. This is the site: https://www.teachworkoutlove.com/

I am facing below issue when i share post with pinterest.

General working of the plugin is like when i click on pinterest, sumome plugin will detect all the images in a post and show in a popup box and then we need to select the specific image to share.

BUT FOR SOME POST, PINTEREST DOES NOT DETECT ALL THE IMAGES SEE FOR EXAMPLE: https://www.teachworkoutlove.com/7-great-gifts-for-your-groom-after-marriage/

There are nearly 6 images in a post content, but when i click on pinterest, it show only few images in a popup that provide selection to share the images to pinterest.

I have checked the console, but there does not exists any error.

Is there any setting i am missing on specific posts?

Can any one help me out with what causing this to happen ?

Note: This is plugin , so i cannot share any code on how plugin work. So don't comment that "sHARE YOUR CODE". Hope developer will understand.