Why does VKontakte not see the icon for the site in the contacts block?

Question

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Hello.
There is a VKontakte group, I add links to it (contact block), but for some reason, no matter how hard I try, the site’s link does not appear, but instead of it it’s always standard. I tried other sites to add to contacts, there is no such problem.
On the nginx server. Access to all images and icons is. Maybe I'm doing something wrong? Vkontaktovsky cache also cleared.