CoreData SwiftUI - List not updating

Hi,

I'm creating a To-do list app with SwiftUI. There's a main 'List' view with all the lists users create. When you tap on a list, it takes you to the Detail View with the items in the list. The problem is, when I make a change to the list in the Detail View, it doesn't change in the main list.

The changes are indeed getting saved, as if I restart the app, the changes are persistent.

I've looked at similar issues but none of the solutions seem to be working.

Code Block swift
struct HomeView: View {
    @Environment(\.managedObjectContext) var viewContext
    
    @FetchRequest(entity: ItemGroup().entity, sortDescriptors: [NSSortDescriptor(keyPath: \ItemGroup.createdAt, ascending: false)])
    var groups: FetchedResults<ItemGroup>
        
    var body: some View {
        NavigationView {
            List {
                Section
                 {
                    ForEach(groups, id: \.self) { group in
                        NavigationLink(destination: DetailView(group: .constant(group)), label: {
                                GroupRow(group: group)
                            })
                           // ...

Code Block swift
struct GroupRow: View {
    @ObservedObject var group: ItemGroup
     var body: some View {
        VStack(alignment: .leading) {
            ProgressView(value: group.progress)
            Text(group.wrappedName)
            Text("\(group.ongoingItems.count) Ongoing")
        }
    }
}

Code Block swift
struct DetailView: View {
    @Environment(\.managedObjectContext) private var viewContext
    
    @FetchRequest(entity: Item().entity, sortDescriptors: [NSSortDescriptor(keyPath: \Item.createdAt, ascending: false)])
    private var items: FetchedResults<Item>
    
    @Binding var group: ItemGroup
    
    
    var body: some View {
                ...

Please suggest what might be the solution! Thanks!