Hi,
I have the same problem and I am really frustrated about it.
I contacted the Pinterest support in April and they told me that everything is okay on my side and that the cause is a Pinterest problem.
Since then I contacted them 3x more times and they always told me to wait.
I don’t think they are solving the problem at all.
I contacted the Yoast support and also support of my social sharing plugin. They all told me that everything is fine on my website.
Don’t know what else to do. Has anyone tried creating a new pinterest account?
We gotta solve this somehow guys! Let’s not give up.