Friend request

Ah, I misunderstood you. If you accept someone as friend by clicking on the 'invite as friend' button on someone's profile, that user will get the notification, because by clicking on that button you send him/her a friend request. I think the bug is more that you see the 'invite as friend' button while it should actually be the 'accept' button, which is already reported. If you click on the 'accept' button by the friends page, the player you accept won't get the notification.