Диалоги вконтакте загружаются через раз. В чем проблема?

Question

[bot8]

Помогите разобраться с проблемой!
При запуске диалоги загружаются через раз. В чем может быть проблема?

public class FragmentOnlineDialog extends Fragment {
    private RecyclerView mRecyclerView;
    private DialogsAdapter adapter;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.list_dialogs, container, false);
        mRecyclerView =(RecyclerView) view.findViewById(R.id.recycler_view);
        mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
        UpdateUI();
        return view;
    }

    private class DialogHolder extends RecyclerView.ViewHolder {
        public TextView mTextView;
        public DialogHolder(View view) {
            super(view);
            mTextView = (TextView) view;
        }
    }
    public class DialogsAdapter extends RecyclerView.Adapter<DialogHolder> {
        List<Dialog> dialogs;
        @Override
        public DialogHolder onCreateViewHolder(ViewGroup parent, int viewType) {
            LayoutInflater layoutInflater = LayoutInflater.from(getActivity());
            View v = layoutInflater.inflate(android.R.layout.simple_list_item_1, parent, false );
            return new DialogHolder(v);
        }

        @Override
        public void onBindViewHolder(DialogHolder holder, int position) {
            Dialog dialog = dialogs.get(position);
            holder.mTextView.setText(dialog.getTitleDialog());
        }

        @Override
        public int getItemCount() {
            return dialogs.size();
        }

        public DialogsAdapter(List<Dialog> dialogs) {
            this.dialogs = dialogs;
        }
    }

    private void UpdateUI() {

        List<Dialog> dialogs = getDialogs();
        adapter = new DialogsAdapter(dialogs);
        mRecyclerView.setAdapter(adapter);

    }

  
    private List<Dialog> getDialogs() {
        VKRequest request = VKApi.messages().getDialogs(VKParameters.from(VKApiConst.COUNT,
                20));
        final List<Dialog> dialogs = new ArrayList<>();
        request.executeWithListener(new VKRequest.VKRequestListener() {
            @Override
            public void onComplete(VKResponse response) {
                VKApiGetDialogResponse getMessagesResponse = (VKApiGetDialogResponse) response.parsedModel;
                VKList<VKApiDialog> mDialogs = getMessagesResponse.items;
                for (VKApiDialog d : mDialogs) {
                    Dialog d1 = new Dialog(d.message.body);
                    dialogs.add(d1);
                }


            }
        });
        return dialogs;
    }
}