Seltsames Verhalten von \caption bei Verwendung diakritischer Zeichen

Seltsames Verhalten von \caption bei Verwendung diakritischer Zeichen

Ich habe ein störendes Problem mit \caption, wenn die Bildunterschrift diakritische Zeichen enthält. Die diakritischen Zeichen werden einwandfrei angezeigt, aber die Bildunterschrift selbst wird in diesen Fällen linksbündig ausgerichtet und nicht zentriert. Irgendeine Idee, warum meine Umgebung ein solches Verhalten in der Bildunterschrift verursacht?

Hier ist die relevante Dokumentklasse, die ich verwende.

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Ich verwende RStudio RMarkdown, um mein Dokument auszugeben. Hier ist der fehlerhafte Fall:

---
output: pdf_document
documentclass: phdthesis
---

\newpage
## Professora Sonia Brüsch (PSDC)\index{PSDC}

\begin{figure}[ht!]
\centering
\subcaptionbox{Mapa da Votação}{
  \includegraphics[width=.98\linewidth]{figures/Cabos/2016/MAPA_13.pdf}}
  \makebox[0pt][r]{\raisebox{16mm}{\includegraphics[height=35mm]{figures/Cabos/2016/Legenda.pdf}}\hspace{12mm}}
\medskip
\subcaptionbox{Informações do Candidato}{
  \includegraphics[width=75mm,height=30mm]{figures/Cabos/2016/13_INFO_CAND.jpg}
  }\quad
\subcaptionbox{Medidas de Desempenho Eleitoral}{
  \includegraphics[width=73mm,height=30mm]{figures/Cabos/2016/13_INFO_ELEIT.jpg}
  }
\caption{Análise de Desempenho Eleitoral\\Professora Sonia Br$ü$sch (PSDC), Curitiba, 2016}
\end{figure}

Das Ergebnis ist die folgende, nicht ganz so schön ausgerichtete Überschrift:

Bildbeschreibung hier eingeben

Antwort1

Normalerweise sind mehrzeilige Überschriften im Blocksatz ausgerichtet. Wenn Sie sie zentriert haben möchten, müssen Sie verwenden \captionsetup{justification=centering}.

Hinweis: Einige der Änderungen sind völlig unentgeltlich.

\documentclass{book}
\usepackage[utf8]{inputenc}
%\RequirePackage{fix-cm}
\usepackage[OT1,T1]{fontenc}
\usepackage[scaled]{helvet}
\renewcommand*\familydefault{\sfdefault}
\usepackage{microtype}
%\RequirePackage[english]{babel}
\usepackage[brazilian]{babel}
\usepackage{caption}
\usepackage{subcaption}
\usepackage[demo]{graphicx}
\usepackage{showframe}
\begin{document}

\begin{figure}[ht!]
\centering
\subcaptionbox{Mapa da Votação}{
  \includegraphics[width=.98\linewidth]{figures/Cabos/2016/MAPA_13.pdf}}
  \llap{\raisebox{16mm}{\includegraphics[height=35mm]{figures/Cabos/2016/Legenda.pdf}}\hspace{12mm}}
\medskip
\subcaptionbox{Informações do Candidato}{
  \includegraphics[width=75mm,height=30mm]{figures/Cabos/2016/13_INFO_CAND.jpg}
  }\quad
\subcaptionbox{Medidas de Desempenho Eleitoral}{
  \includegraphics[width=73mm,height=30mm]{figures/Cabos/2016/13_INFO_ELEIT.jpg}
  }
\captionsetup{justification=centering}
\caption{Análise de Desempenho Eleitoral\\Professora Sonia Br\"usch (PSDC), Curitiba, 2016}
\end{figure}

\end{document}

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