Plugin not displayed when visitor is not logged into Facebook

Hello.
I have next situation:
If visitor is logged to facebook plugin displayed as it should https://media.areama.net/uploads/2019-01-29_111527.png

But if visitor is not logged into facebook I see an error https://media.areama.net/uploads/2019-01-29_111640.png

I see frame-ancestors is https://facebook.com only https://media.areama.net/uploads/2019-01-29_111709.png

I have added my domain to whitelist in page settings https://media.areama.net/uploads/2019-01-29_111957.png

What can be a problem?

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