Since upgrading to iOS 9.0 and further versions on my iPhone 5 and also on my new iPhone 6S, Spotlight seems to be acting up. It does not show a few contacts in it's search results, even though it displays the messages received from that contact. This is not an every time occurrence, but it works as per its whims and fancies. Is anyone else facing the same issue? What can be done about it? Wait for iOS 9.1?