Memory leak in refreshable view

I'm trying to call the refresh function in the view model from the .refreshable in a view.

I have tested it with an empty function in the viewModel and it causes a memory leak in this view

struct TopicListView: View {
  @StateObject private var viewModel: TopicListViewModel
  @State private var boardId: String
  @State private var boardName: String
   
  init(dataFetchable: DataFetchable, boardId: String, boardName: String) {
    self._viewModel = StateObject(wrappedValue: TopicListViewModel(dataFetchable: dataFetchable))
    self.boardId = boardId
    self.boardName = boardName
  }
   
  var body: some View {
    List(viewModel.topics.indices, id: \.self) { index in
      HStack {
        TopicView(title: viewModel.topics[index].title, lastPostTime: viewModel.topics[index].lastPostTime, formatter: viewModel.dateFormatter)
         
        NavigationLink(destination: PostView(dataFetchable: viewModel.dataFetchable, title: viewModel.topics[index].title, topicId: viewModel.topics[index].id)) {
           
          EmptyView()
        }
        .frame(width: 0)
        .opacity(0)
      }
      .onAppear {
        if index == viewModel.topics.count-1 {
          viewModel.page+=1
          viewModel.fetchTopics(boardId)
        }
      }
    }
    .listStyle(.plain)
    .navigationBarTitle(boardName)
    .refreshable {
      await viewModel.doNotThing()
    }
    .onAppear {
      viewModel.boardId = boardId
    }
  }
}

However, the PostView which I have linked with a NavigationLink have no issue

struct PostView: View {
  @State private var title: String
  @State private var topicId: String
  @StateObject private var viewModel: PostViewModel
   
  init(dataFetchable: DataFetchable, title: String, topicId: String) {
    self._viewModel = StateObject(wrappedValue: PostViewModel(dataFetchable: dataFetchable))
    self.topicId = topicId
    self.title = title
  }
   
  var body: some View {
    List(viewModel.posts, id: \.id) { item in
      TextblockView(textBlock: item.textBlock)
    }
    .listStyle(.plain)
    .navigationBarTitle(title)
    .navigationBarTitleDisplayMode(.inline)
    .refreshable {
      await viewModel.doNotThing()
    }
    .onAppear(perform: {
      viewModel.topicId = topicId
    })
     
  }
}

Here is the memory graph

Any ideas how to fix it?