Why is the photo from the og:image tag not loading when sharing to classmates?

Question

HTML

There is a news site primamedia.ru when trying to share some news, the image from the og:image tag is not inserted into the post. Here is an example of problematic news : primamedia.ru/news/655819/?utm_source=ok&utm_mediu ... a note to your page in classmates, then instead of the image from the og:image tag, an image taken from another news, which is generally located in the tag, will be inserted. How to solve this problem? Screenshots for clarity: above is an attempt to insert news with a problem, below - without a problem