Change in the child view trigger Parent view activation

I have an application with multiple views (three levels). The single source of truth, a data structure, is passed, from parent to child, using an @EnvironmentObject. Now, in the child view, as soon as I touch any control like a Toggle (bound to a boolean element of the passed data structure) the application switch immediately to the parent View. What I am doing wrong?

Thanks

Parent View code:

//
//  TestView.swift
//  swiftui-test

import SwiftUI

let freqNames = ["minutes": "minute", "hourly": "hour", "daily":"day", "weekly":"week", "monthly":"month"]

struct WateringView: View {
    @EnvironmentObject var hacData: HACModelData
    @State private var editMode = EditMode.inactive
    
    var body: some View {
        let _ = print(hacData)
        VStack {
            List {
                Section(header: Text("Plant activation schedule")) {
                    Toggle(isOn: $hacData.hac.watering.plantActive) {
                        Text("Plant active")
                    }
                    DatePicker("Start date", selection: $hacData.hac.watering.scheduling.startDTime)
                        .environment(\.locale, Locale(identifier: "en_IT"))
                    Picker("Repeat frequency", selection: $hacData.hac.watering.scheduling.repeatFreq) {
                        ForEach(HAC.WateringControl.ScheduleData.RepeatFrequency.allCases) { repfreq in
                            Text(repfreq.id)
                        }
                    }
                    .pickerStyle(MenuPickerStyle())
                    let pfix = hacData.hac.watering.scheduling.repeatCount > 1 ? "s":""
                    Stepper("Repeat every \($hacData.hac.watering.scheduling.repeatCount) \(freqNames[$hacData.hac.watering.scheduling.repeatFreq]!)\(pfix)",
                            value: $hacData.hac.watering.scheduling.repeatCount, in: 1...60, step: 1)
                }
 
                Section(header: Text("Zones")) {
                    ForEach(hacData.hac.watering.zones, id: \.id) { zone in
                        NavigationLink(destination: ZoneView(zone: zone)) {
                            ZoneItemView(zone: zone)
                        }
                    }
                    .onMove(perform: onMove)
                }
            }
            .navigationBarTitle(Text("Watering setup"))
            .navigationBarItems(leading: EditButton())
            .environment(\.editMode, $editMode)
        }
    }
        
    private func onMove(source: IndexSet, destination: Int) {
        hacData.hac.watering.zones.move(fromOffsets: source, toOffset: destination)
    }
}

struct WateringView_Previews: PreviewProvider {
    static let hacData = HACModelData()
    static var previews: some View {
        WateringView()
    }
}

Child View code:

//
//  ZoneView.swift
//  swiftui-test
//
//  Created by Franco Fiorese on 15/08/21.
//

import SwiftUI

struct ZoneView: View {
    @EnvironmentObject var hacData: HACModelData
    var zone: HAC.WateringControl.Zone
    var zoneIndex: Int {
        hacData.hac.watering.zones.firstIndex(where: { $0.id == zone.id })!
    }
    
    var footer1: some View {
        Text("Enable or Disable the Zone during the scheduled watering cycles")
    }
    var footer2: some View {
        Text("Activate zone watering immediately")
    }
    var footer3: some View {
        Text("Set the zone watering cycle duration in minutes")
    }
    var body: some View {
        let _ = print("\(zone.id) -> \(zone)")
        let _ = Self._printChanges()
        VStack {
            List {
                Section(/* header: Text("Current state"), */ footer: footer1) {
                    Toggle(isOn: $hacData.hac.watering.zones[zoneIndex].isEnabled) {
                        Text("Enable during scheduling")
                    }
                }
                Section(/* header: Text("Activation"), */ footer: footer2) {
                    Toggle(isOn: $hacData.hac.watering.zones[zoneIndex].isActive) {
                        Text("Activate")
                    }
                }
                Section(header: Text("Duration"), footer: footer3) {
                    HStack {
                        Slider(value: $hacData.hac.watering.zones[zoneIndex].duration, in: 0...60, step: 1)
                            .accentColor(Color.green)
                        Text("\(Int(zone.duration))")
                    }
                }
            }
            .navigationBarTitle(Text("Zone setup"))
            Spacer()
        }
    }
}

struct ZoneView_Previews: PreviewProvider {
    static let hacData = HACModelData()
    static var previews: some View {
        ZoneView(zone: hacData.hac.watering.zones[0])
            .environmentObject(hacData)
    }
}