Vulnerability found, access to contacts in iOS 12.1

In order to view all contacts on any iPhone smartphone running iOS 12.1, you do not need to have some powerful hacker programs or extensive experience in obtaining confidential information. It is enough to use only the popular FaceTime application.
During an incoming group video call, anyone, having someone else's Apple smartphone on hand, can easily find out all the information about any of the contacts only by using the “add interlocutor” option and viewing the opened contact list.