itemize environment inside theorem

Question

When I have an itemize environment inside a theorem and refer to the theorem later on, the document doesn't point to the right location. For example, consider the following toy example:

\documentclass[a4paper, 11 pt]{article}
\usepackage{amsmath,amssymb,amsthm,mathrsfs,amsfonts} 

\usepackage{hyperref}

\newtheorem{thm}{Theorem}[section]

\begin{document}
\title{Test}
\maketitle

\newpage

\section{Test}
\begin{thm}\label{Thm}
\begin{itemize}
\item a
\item b
\end{itemize}
\end{thm}

\newpage

Theorem \ref{Thm} is a test.


\end{document}

When I click the referring number of the Theorem, the document jumps to the first page, instead of the desired second page. Could anyone help me out here? Thanks in advance!

Answer 1

Insert a manual hyperlink mark using \phantomsection:

\documentclass{article}

\usepackage{amsthm}
\usepackage{hyperref}

\newtheorem{thm}{Theorem}[section]

\begin{document}

\title{A title}\author{An author}
\maketitle

\newpage

\section{A section}

\begin{thm}\phantomsection\label{Thm}
  \begin{itemize}
    \item a
    \item b
  \end{itemize}
\end{thm}

Theorem \ref{Thm} is a test.

\end{document}

The problem here seems to stem from a combined page-break + sectional unit + list environment, where no proper mark is set. That is, TeX is still be in vertical mode. An appropriate issue of \leavevmode would also work, but that may alter the placement of content.