EDITED:
I noticed this, when I upgraded to Xcode 7.1 from Xcode 7, which used the ios 9.1 simulator as default. A presented view from a called segue via performSegueWithIdentifier doesn't present push on the navigations stack that is, I get no back button chevron - the view slides up from the bottom almost like it is modal. Actually the app feels like it freezes Any ideas???
Updated: The issue happens with Xcode 7x and iOS 9x as seen in this stack overflow post (that presents a solution):
Very weird and huge bug. Placeholder texts are very necessary during design.