Sharing not showing image

[Sciencegreat]

I am passing through a bug which is driving me crazy.

When I share from this material http://futurist.ru/articles/459 no Image shows
on the other hand When I share from that one http://futurist.ru/articles/430 Twitter card looks good

They both follow the same HTML structure markup and they both have their image meta tags tags mentioned.

I tried it with https://cards-dev.twitter.com/validator they both showed no error symptoms.
Someone please help me.

Thanks in advance

[system]

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