Why does the Pinterest custom share URL not create a rich pin only on iOS Safari?

Question

Background: I'm using the custom pin share URL as you can see in the example below.

Problem: This share URL works on every single operating system and browser except Safari on iOS. It works in all other browsers on iOS, and it works in Safari on all other operating systems.

Example Link: https://pinterest.com/pin/create/button/?url=http://redefiningmom.com/the-real-reason-i-left-corporate-america/&media=http%3A%2F%2Fredefiningmom.com%2Fwp-content%2Fuploads%2F2016%2F01%2Freal-reason-i-left-corporate-america-pinterest.jpg&description=After+ten+years%2C+I+quit+my+job+in+Corporate+America.+Find+out+the+real+reason+I+left+Corporate+America+and+how+you+can+too.

Desired/Usual Behavior: This link would open a share dialogue leading to the creation of a rich pin with a large image, a description, and a link back to the webpage.

Undesired Behavior: Only on Safari on iOS this opens a share dialogue leading to the creation of a non-rich pin with a large image, a description and a link to the image, not the web page.

How do I fix this?

Answer 1

Using an iPhone 5S with iOS 9.2.1 (the latest), the pages look exactly the same on Chrome and Safari: