I’m new to SwiftUI and I couldn’t understand why the selectedUser is set to nil on the fullScreenCover block. Note that User is a class from a third party library and doesn’t conform to ObservableObject

struct Users: View {
    
    @State private var isUserSelected = false
    @State private var shouldPresentCallScreen = false
    @State private var selectedUser: User? = nil {
        didSet {
            isUserSelected = selectedUser != nil
            
            shouldPresentCallScreen = isUserSelected
        }
    }
    
    var body: some View {
        UserListView(
           onUserSelected: { user in
               //user is not nil here. 
               selectedUser = user
           }
        )
        .fullScreenCover(isPresented: $shouldPresentCallScreen) {
            //shouldPresentCallScreen is false and
            //selectedUser is null here.
            UserDetail(user: selectedUser)
        }
    }
}