I have a UINavigationController with default value of it\'s navigationBar.prefersLargeTitles = true .
I am switching that to false>
In my case this problem was occurring during a segue to a view controller which is a child of a UITabBarController. Setting largeTitleDisplayMode on the child view controller was not enough to fix this bug.
I have solved the issue by adding a navigation item to the UITabBarController scene and setting largeTitleDisplayMode as .never there.