Pause in second Itemize doesn't work like first one

In the next MWE I created, I don’t understand why Item 2.2 is not paused like Item 1.2. I think I am missing something but I don’t know what!

documentclass[fleqn,xcolor={dvipsnames,table}]{beamer}
usepackage[utf8]{inputenc}
usepackage[T1]{fontenc}

% Thème CambridgeUS
usetheme{CambridgeUS}
  usecolortheme{rose}
    setbeamercovered{transparent}

setbeamertemplate{itemize items}[circle]
setbeamertemplate{itemize subitem}[circle]
setbeamercolor{itemize item}{fg = darkred}
setbeamercolor{itemize subitem}{fg = darkred}
setbeamercolor*{block title}{fg=darkred!90,
bg= blue!5}
setbeamercolor*{block title example}{fg=violet!90,
bg= darkred!5}
setbeamercolor{section in toc}{fg=black}
setbeamercolor*{title}{bg=blue!5,fg=darkred}
setbeamercolor{section in head/foot}{fg=white}
setbeamertemplate{enumerate items}[default]
% setbeamercolor*{enumerate item}{fg=darkred}
setbeamercolor{local structure}{fg=darkred}

begin{document}

  begin{frame}
    frametitle{Some Title}

    begin{minipage}[c]{.55linewidth}
      begin{center}
        Some figure
      end{center}
    end{minipage} hfill

    begin{minipage}[c]{.43linewidth}
    begin{center}
      only<1-2>{
        begin{itemize}[<+->]
          vfill item Item 1.1
          vfill item Item 1.2
        end{itemize}
      }
      only<3-4>{
        begin{itemize}[<+->]
            vfill item Item 2.1
            vfill item Item 2.2
        end{itemize}
        }
    end{center}
    end{minipage}
  end{frame}

end{document}

    only<3-4>{
    begin{itemize}[<+(2)->]
        vfill item Item 2.1
        vfill item Item 2.2
    end{itemize}
    }