Transfers to another View for no reason

Using Swift
1

I've shortened my code as much as possible. The problem is that when I click on the "Generate" button inside CreateView, I am transferred to WaitView for a tenth of a second, after which I am transferred back to CreateView.

I quickly realized that the problem was a modification of the DataManager, since when I deleted this code:
dataManager.data.append(SomeData(data: newData))
this problem disappeared. But this obviously doesn’t suit me, because I need to change the data. I also noticed that if you remove this code:

NavigationLink(destination: CreateView(dataManager: dataManager)) {
                                    Text(data_item.data)
                                }

from ListView, then everything will work. I can't imagine how this should affect this at all. But I can't delete it either.

What could be the problem?

code:

import Foundation
import SwiftUI


struct SomeData: Identifiable {
    let id = UUID()
    var data: String
}

class DataManager: ObservableObject {
    @Published var data: [SomeData]
    init() {
        data = [SomeData(data: "test")]
    }
}

struct ContentView: View {
    @StateObject var dataManager: DataManager = DataManager()
    var body: some View {
        NavigationView {
            ListView(dataManager: dataManager)
            .navigationTitle("First View")
        }
    }
}

struct ListView: View {
    @ObservedObject var dataManager: DataManager
    
    var body: some View {
        NavigationView {
            VStack {
                NavigationLink(destination: CreateView(dataManager: dataManager)) {
                    Text("GENERATE")
                        .font(.title)
                        .foregroundColor(.white)
                        .padding()
                        .frame(width: 200, height: 200)
                        .background(Color.blue)
                        .clipShape(Circle())
                    
                }
                .padding(100)
                
                
                Spacer()
                VStack (alignment: .leading) {
                    Text("History")
                        .font(.title3)
                        List {
                            ForEach(dataManager.data) {data_item in
                                NavigationLink(destination: CreateView(dataManager: dataManager)) { //When I remove this line everything works
                                    Text(data_item.data)
                                }
                            }
                            
                        }
                        .listStyle(.automatic)
                        .cornerRadius(20)

                }
                .padding()
            }
        }
    }
}

struct CreateView: View {
    @ObservedObject var dataManager: DataManager
    @State var fieldData: String = "some data here"
    
    var body: some View {
        UITableView.appearance().backgroundColor = .clear
        return VStack {
            NavigationLink(destination: WaitView(dataManager: dataManager, newData: fieldData)) {
                Text("Generate")
                    .padding()
                    .background(Color.red)
            }

        }
        .navigationBarTitleDisplayMode(.inline)
    }}

struct WaitView: View {
    @ObservedObject var dataManager: DataManager
    let newData: String
    
    var body: some View {
        Text("Wait for something...")
            .navigationTitle("Third View")
            .onAppear {
                dataManager.data.append(SomeData(data: newData))//When I remove this line everything works
                print("adding")
            }
    }
}