# \insertshorttitle with frame titles and \setbeameroption{show notes on second screen}

The MWE below does not work when \insertshorttitle is used as the title of the frame if \setbeameroption{show notes on second screen} is active as well. W/o either it works fine. \inserttitle does not exhibit this behavior. Why? Is this a bug in beamer?

\documentclass[notes]{beamer}
\usepackage[utf8]{inputenc}
\usepackage{pgfpages}
\title[This is the rather long short title]{This is the title}

\setbeameroption{show notes on second screen}

\begin{document}

%\begin{frame}{\inserttitle}
\begin{frame}{\insertshorttitle}
Nono :(

\insertshorttitle within the frame works fine
\end{frame}

\end{document}


The error message I receive is:

! Extra }, or forgotten \endgroup.
\beamer@stend ->\egroup


Not sure why this problem occurs, but as a workaround you could put \insertshorttitle into an additional group:

\documentclass[
%notes % This option is obsolete
]{beamer}
\usepackage[utf8]{inputenc}
\usepackage{pgfpages}
\title[This is the rather long short title]{This is the title}

\setbeameroption{show notes on second screen}

\begin{document}

\begin{frame}
\frametitle{{\insertshorttitle}}
Nono :(

\insertshorttitle within the frame works fine
\end{frame}

\end{document}