API social. The network responds to the API_callback method only if the "Close" button is clicked. Is this a social media bug?

Question

API

When making a payment for OKs, the user is shown a window of your social network with a notification about the purchase made, the window has two options for closing. "Close" button and a cross in the upper right corner of the window. API social. The network responds to the API_callback method only if the "Close" button is clicked. Is this a social media bug? Is it planned to add a response from the social network by clicking on this cross? When will a system for testing payments for developers appear on Odnoklassniki?