Navigation bar uicontrols are not appearing in certain devices on iOS 11 and iOS 12, if the code is compiled on Xcode 10.1. Works perfectly fine if the code is compiled on Xcode 9.2.
Found simmilar ssue reported - Xcode 10 NavigationBar icons not appearing on some devices
but the suggested solution to change the settings did not solve the issue.
Wondering someone else has seen the same issue.