Apple does this, a lot. The number of times I have incorrectly called somebody on FaceTime because I clicked on a contact at the same time FaceTime decided to update the list should be embarrassing for them. I have zero idea how this doesn't get fixed. It should be a trivial change to make sure the list is updated however they'd like before showing it to the user. As it is right now, given that it's slower or about as fast as me clicking something on the screen, it seems updating the list is the very last thing they do.