Large title missing while returnin… | Apple Developer Forums

Large title missing while returning from navigation view

I have a tool bar with a picker and the navigation bar title is set to large. The initial screen is ok, but once I navigate to the detailed view and return to the main screen, my title is missing. I am unable to find an answer. Kindly help.

Code Block 
var body: some View {
        NavigationView {
            VStack {
                TabView(selection: $choice,
                        content:  {
                            OPListCell()
                            IPListCell()
                        })
                    .tabViewStyle(PageTabViewStyle())
            }
            .listStyle(PlainListStyle())
            .navigationBarTitle(Text("My Patients"), displayMode: .large)
            .toolbar {
                ToolbarItem(placement: .principal) {
                    HStack {
                        Picker(selection: self.$choice, label: Text("")) {
                            ForEach(0 ..< self.choices.count) {
                                Text(self.choices[$0])
                            }
                        }
                        .frame(width: 175)
                        .pickerStyle(SegmentedPickerStyle())
                        .padding(.leading, 10)
                    }
                }
            }
        }
    }
}