iOS14 introducing errors with @State bindings

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It looks like in iOS 14 the sheet(isPresented:content:) is now created beforehand, so any changes made to selectedModel are ignored.

Try using sheet(item:content:) instead:

var body: some View {
    List {
        ...
    }
    .sheet(item: self.$selectedModel) {
        SpeakerDetailView(speaker: $0)
    }
}

and dismiss the sheet using @Environment(\.presentationMode):

struct SpeakerDetailView: View {
    @Environment(\.presentationMode) private var presentationMode
    var speaker: Speaker

    var body: some View {
        Text("Speaker view")
            .onTapGesture {
                presentationMode.wrappedValue.dismiss()
            }
    }
}

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