How to group data from realmDB

MongoDB Atlas App Services & Realm
3

I have UITableView with 2 separated sections of users.
1 section - online users
2 section - offline users
When I try to make two separated realmdb request like that:

    conversationsResult = dbUsers.filter{$0.isOnline}

    conversationsNotificationToken = conversationsResult?.observe { [weak output] changes in
      guard let output = output else { return }
      output.receivedConversationsDataChanges(changes)
    }

For users who is online and for user who is offline

    conversationsOfflineResult = dbUsers.filter{!$0.isOnline}

    conversationsNotificationTokenOffline = conversationsResultOffline?.observe { [weak output] changes in
      guard let output = output else { return }
      output.receivedConversationsDataChangesOffline(changes)
    }

Each of changes change only specific section by change example method from documentation:

  func applyChanges<T>(changes: RealmCollectionChange<T>, section: Int = 0) {
    switch changes {
    case .initial:
      reloadSections([section], with: .none)
    case .update(_, let deletions, let insertions, let updates):
      let fromRow = {(row: Int) in
        return IndexPath(row: row, section: section)}

      beginUpdates()
      deleteRows(at: deletions.map(fromRow), with: .automatic)
      insertRows(at: insertions.map(fromRow), with: .automatic)
      reloadRows(at: updates.map(fromRow), with: .none)
      endUpdates()
    default: break
    }
  }

But when user change status from offline to online or vice verse both sections update async and my app crashed. Because data array is wrong.
Currently I use reloadData instead method for update whole talbeView. But its ugly solution.
Help find correct solution for update UITableView/UICollectionView with multiply section based on Results of Realm db class.