No, this is not the problem.
Of course, we installed the SameSite plugin.
But the problem remains.
Once again about the problem: when going from page to page, or after reloading the page, there are calls from our server to your server.
We need to understand how to remove these alien requests for our server?
Please see the screen: https://prnt.sc/qqvoc1
Also, you can see the problem in the browser console yourself: http://1.onco-center.ru/
Please consult with developers about this issue.
Thanks!