pdftooltip del paquete pdfcomment no funciona en modo horizontal

pdftooltip del paquete pdfcomment no funciona en modo horizontal

Intento utilizar el \pdftooltip{}paquete pdfcomment en un documento en modo horizontal. El mouseover funciona en modo normal, pero falla en modo horizontal. En el modo horizontal, solo el primer carácter pasa el mouse sobre la palabra completa. Represento el pdf con este script de rmarkdown (la primera página tiene información sobre herramientas normal, la segunda tiene una incorrecta):

---
output:
  pdf_document: 
    latex_engine: xelatex
    number_sections: no
    keep_tex: true
mainfont: Open Sans
header-includes:
- \usepackage{grid-system}
- \usepackage[framemethod=TikZ]{mdframed}
- \usepackage{xcolor}
- \usepackage{geometry}
- \geometry{top=0.2cm,margin=0.2cm}
- \usepackage{atbegshi}
- \usepackage{pdflscape}
- \usepackage{hyperref}
- \usepackage[document]{ragged2e}
- \usepackage{pdfcomment}
---

\pdftooltip{\mbox{mouseover1}}{this is a mouseover text}
\begin{landscape}
\pdftooltip{\mbox{mouseover2}}{this is a mouseover text}
\end{landscape}

Este es el archivo LaTeX que crea antes de renderizar el pdf:

\documentclass[]{article}
\usepackage{lmodern}
\usepackage{amssymb,amsmath}
\usepackage{ifxetex,ifluatex}
\usepackage{fixltx2e} % provides \textsubscript
\ifnum 0\ifxetex 1\fi\ifluatex 1\fi=0 % if pdftex
  \usepackage[T1]{fontenc}
  \usepackage[utf8]{inputenc}
\else % if luatex or xelatex
  \ifxetex
    \usepackage{mathspec}
  \else
    \usepackage{fontspec}
  \fi
  \defaultfontfeatures{Ligatures=TeX,Scale=MatchLowercase}
    \setmainfont[]{Open Sans}
\fi
% use upquote if available, for straight quotes in verbatim environments
\IfFileExists{upquote.sty}{\usepackage{upquote}}{}
% use microtype if available
\IfFileExists{microtype.sty}{%
\usepackage{microtype}
\UseMicrotypeSet[protrusion]{basicmath} % disable protrusion for tt fonts
}{}
\usepackage[margin=1in]{geometry}
\usepackage{hyperref}
\hypersetup{unicode=true,
            pdfborder={0 0 0},
            breaklinks=true}
\urlstyle{same}  % don't use monospace font for urls
\usepackage{graphicx,grffile}
\makeatletter
\def\maxwidth{\ifdim\Gin@nat@width>\linewidth\linewidth\else\Gin@nat@width\fi}
\def\maxheight{\ifdim\Gin@nat@height>\textheight\textheight\else\Gin@nat@height\fi}
\makeatother
% Scale images if necessary, so that they will not overflow the page
% margins by default, and it is still possible to overwrite the defaults
% using explicit options in \includegraphics[width, height, ...]{}
\setkeys{Gin}{width=\maxwidth,height=\maxheight,keepaspectratio}
\IfFileExists{parskip.sty}{%
\usepackage{parskip}
}{% else
\setlength{\parindent}{0pt}
\setlength{\parskip}{6pt plus 2pt minus 1pt}
}
\setlength{\emergencystretch}{3em}  % prevent overfull lines
\providecommand{\tightlist}{%
  \setlength{\itemsep}{0pt}\setlength{\parskip}{0pt}}
\setcounter{secnumdepth}{0}
% Redefines (sub)paragraphs to behave more like sections
\ifx\paragraph\undefined\else
\let\oldparagraph\paragraph
\renewcommand{\paragraph}[1]{\oldparagraph{#1}\mbox{}}
\fi
\ifx\subparagraph\undefined\else
\let\oldsubparagraph\subparagraph
\renewcommand{\subparagraph}[1]{\oldsubparagraph{#1}\mbox{}}
\fi

%%% Use protect on footnotes to avoid problems with footnotes in titles
\let\rmarkdownfootnote\footnote%
\def\footnote{\protect\rmarkdownfootnote}

%%% Change title format to be more compact
\usepackage{titling}

% Create subtitle command for use in maketitle
\newcommand{\subtitle}[1]{
  \posttitle{
    \begin{center}\large#1\end{center}
    }
}

\setlength{\droptitle}{-2em}
  \title{}
  \pretitle{\vspace{\droptitle}}
  \posttitle{}
  \author{}
  \preauthor{}\postauthor{}
  \date{}
  \predate{}\postdate{}

\usepackage{grid-system}
\usepackage[framemethod=TikZ]{mdframed}
\usepackage{xcolor}
\usepackage{geometry}
\geometry{top=0.2cm,margin=0.2cm}
\usepackage{atbegshi}
\usepackage{pdflscape}
\usepackage{hyperref}
\usepackage[document]{ragged2e}
\usepackage{pdfcomment}

\begin{document}

\pdftooltip{\mbox{mouseover1}}{this is a mouseover text}

\begin{landscape}
\pdftooltip{\mbox{mouseover2}}{this is a mouseover text}
\end{landscape}


\end{document}

¿Alguien sabe qué está pasando aquí? ¿Existe una solución para hacer que pdftooltip funcione en modo horizontal?

EDITARGracias a los comentarios entiendo lo que pasa. No \pdftooltip{}parece girar al modo horizontal. ¿Cómo podemos solucionar esto?

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