update child view from parent does not work when state change

[saroar]

public struct ConversationsState: Equatable {
  ..........
  public var conversations: IdentifiedArrayOf<ConversationResponse.Item> = []
}

public struct TabsState: Equatable {
  ........
  public var conversations: ConversationsState
}

public let tabsReducer = Reducer<TabsState, TabsAction, TabsEnvironment> { state, action, environment in
 ..............................
  case let .receivedSocketMessage(.success(.string(str))):

      guard let data = str.data(using: .utf8) else {
        return .none
      }

      let chatOutGoingEvent = ChatOutGoingEvent.decode(data: data)

      switch chatOutGoingEvent {
      case .conversation(let message):

          // before update working update child my view
          guard let index = state.conversations.conversations
            .firstIndex(where: { $0.id == message.conversationId }) else {
          return .none
          }
          state.conversations.conversations[index].lastMessage = message
          // old code crash becz
         // "use the id-based subscript, instead, for in-place modification"

          // after which not working not update my child view
          state.conversations.conversations[id: message.conversationId]?
          .lastMessage = message
        return .none
      case .message(let message):
        state.conversations.chatState?.messages.insert(message, at: 0)
        return .none
      }
}

[mbrandonw]

I am going to convert this to a discussion as it doesn’t appear to be an issue with the library.