SwiftUI List/Destination Navigation Bar Title Ghosting - ios

Question

I'm experiencing a strange visual bug with navigation bar titles. This swiftUI app has
a basic master/detail type view with a List view and a Detail view that is presented
with a NavigationLink. That Detail view is then a list of Texts displaying information
or a list of TextFields when the page is in the edit mode.
When in the Detail view with edit mode and I scroll to the bottom item in the list and
edit it then the navigationBarTitle on the first view has a ghost of the "Detail"
navigationBarTitle of the second view. If I don't scroll the ghosting does not appear.
By scrolling, I include the scroll so the keyboard does not hide the textfield.
If I change the Detail view navigationBarTitle to .inline the issues is a nearly
imperceptible flash with no permanent residual. Obviously, I will leave it in this mode
but I'd certainly prefer a standard iOS look and feel.
I've experimentally disabled every combination that I can think of - no joy.
The root List:
NavigationView {
List {
ForEach(myPhysicians, id: \.self) { mp in
NavigationLink(destination: PhysicianDetailView(physician: mp)) {
Text(mp.lastName ?? "no last name")
}
}
.onDelete { indexSet in
//standard core data delete process
}
}.navigationBarTitle("Physicians")
.navigationBarItems(
leading:
NavigationLink(destination: AddPhysicianView()) {
Image(systemName: "plus.circle.fill")
.font(.title)
},
trailing:
EditButton()
)//bar button items
}//nav
The Detail View:
var body: some View {
DispatchQueue.main.async {
self.localFirstName = self.physician.wrappedFirstName
self.localLastName = self.physician.wrappedLastName
//bunch more...
}
return ZStack(alignment: .topTrailing) {
List {
VStack { //group 1
VStack (alignment: .leading) {
Text("First Name:")
.font(.system(size: 14))
.font(.subheadline)
if !showEditView {
Text("\(physician.wrappedFirstName)")
.frame(maxWidth: .infinity, alignment: .leading)
.padding(.vertical, 5)
.textFieldStyle(RoundedBorderTextFieldStyle())
.font(.headline)
} else {
TextField("tf firstname", text: $localFirstName)
.modifier(TextFieldSetup())
}
}
VStack (alignment: .leading) {
Text("Last Name:")
.font(.system(size: 14))
.font(.subheadline)
if !showEditView {
Text("\(physician.wrappedLastName)")
.frame(maxWidth: .infinity, alignment: .leading)
.padding(.vertical, 5)
.textFieldStyle(RoundedBorderTextFieldStyle())
.font(.headline)
} else {
TextField("tf lastname", text: $localLastName)
.modifier(TextFieldSetup())
}
}
//bunch more...
}//outer vstack
}//list
.frame(maxWidth: .infinity - 20)
//.navigationBarTitle("Detail",displayMode: .inline)
.navigationBarTitle("Detail")
.navigationBarBackButtonHidden(true)
.navigationBarItems(
leading:
Button(action: {
self.presentationMode.wrappedValue.dismiss()
}) {
if self.showEditView {
Text("Cancel")
} else {
Image(systemName: "arrowshape.turn.up.left.circle.fill")
.font(.title)
}
},
trailing:
Button(action: {
if self.showEditView {
self.saveEditedPhysicianToCoreData(physician: self.physician)
}
self.showEditView.toggle()
}) {
Image(systemName: self.showEditView ? "gear" : "square.and.pencil")
.font(.title)
.frame(width: 60, height: 60)
}
)//nav bar items
}//zstack
.modifier(AdaptsToSoftwareKeyboard())
}//body
Any guidance would be appreciated. Xcode 11.6 iOS 13.6
Added: 29 July 2020
struct AdaptsToSoftwareKeyboard: ViewModifier {
#State var currentHeight: CGFloat = 0
func body(content: Content) -> some View {
content
.padding(.bottom, self.currentHeight)
.edgesIgnoringSafeArea(self.currentHeight == 0 ? Edge.Set() : .bottom)
.onAppear(perform: subscribeToKeyboardEvents)
}
private let keyboardWillOpen = NotificationCenter.default
.publisher(for: UIResponder.keyboardWillShowNotification)
.map { $0.userInfo![UIResponder.keyboardFrameEndUserInfoKey] as! CGRect }
.map { $0.height }
private let keyboardWillHide = NotificationCenter.default
.publisher(for: UIResponder.keyboardWillHideNotification)
.map { _ in CGFloat.zero }
private func subscribeToKeyboardEvents() {
_ = Publishers.Merge(keyboardWillOpen, keyboardWillHide)
.subscribe(on: RunLoop.main)
.assign(to: \.self.currentHeight, on: self)
}
}