SwiftUI List with children crashes when the last item is deleted

Hello,
I narrowed down the problem and created a clean project. The code is below.
I found similar issue on forum, it was fixed there eventually for a regular list. However it wasn't fixed for a list with children.

Reproduces 100% of time, faced on macOS 11.1, I'm on "11.2 Beta (20D5029f)" currently.
Xcode Version 12.3 (12C33)

Run the project, click the remove button 3 times - it crashes.

Try and remove "children" part of the list, it stops crashing.

The crash happens at

Code Block SwiftUI`SwiftUI.OutlineListUpdater.init(base: SwiftUI.ListStyleDataSource<A>) -> SwiftUI.OutlineListUpdater<A>:

Are there any temporary workarounds?

Code Block import SwiftUIstruct Item: Identifiable {  let id: UUID  let name: String  let children: [Item]?     init(id: UUID = UUID(), name: String = String(UUID().uuidString.prefix(6)), children: [Item]? = nil) {    self.id = id    self.name = name    self.children = children  }}class ViewModel: ObservableObject {     @Published var items: [Item] = ViewModel.generateRandom()     func removeLast() {    var itemsCopy = items    itemsCopy.removeLast()    items = itemsCopy  }     func generateNew() {    items = ViewModel.generateRandom()  }     static func generateRandom() -> [Item] {    [      .init(children: [.init(), .init()]),      .init(children: [.init(), .init()]),      .init(children: [.init(), .init()]),    ]  }}struct ContentView: View {     @StateObject var viewModel: ViewModel = ViewModel()     var body: some View {         VStack {      List(viewModel.items, id: \.id, children: \.children) { item in        VStack {          Text(item.name).padding()          Divider()        }      }             Button("generate new") {        viewModel.generateNew()      }             Button("remove last") {        viewModel.removeLast()      }    }  }}