OK app authentication not working in Safari browser?

Question

Browsers

User authentication in our OK application (game) does not work correctly in the Safari browser.
In the application settings, we specified the following redirect login URL: https://ownpleasure.com/api/login/ok/iframe which should be used to redirect the user to the correct login endpoint.
When the user uses the Chrome browser everything works correctly.
But when the Safari browser is used, the request for user authentication is somehow sent to the wrong address. The redirect does not occur to the address we specified, but to our main domain https://ownpleasure.com/. Therefore, our application server does not receive the request and, as a result, the user cannot be correctly authenticated.
Please help to deal with this problem.