% #2095 subfigures get wrong reference
% #2118 captionless figures
\documentclass{article}
\usepackage{caption}
\usepackage{subcaption}
\begin{document}
Total figure~\ref{fig:1} with parts \ref{fig:1_a} and \ref{fig:1_b}.

Also figure~\ref{fig:2}.

\begin{figure}[t!]%
  \begin{subfigure}[t]{0.5\linewidth}%
    [Subfigure A]
    \caption{{Caption A}}\label{fig:1_a}%
  \end{subfigure}%
  \begin{subfigure}[t]{0.5\linewidth}%
    [Subfigure B]
    \caption{{Caption B}}\label{fig:1_b}%
  \end{subfigure}%
  \caption{Figure Caption}\label{fig:1}%
\end{figure}

\begin{figure}
  \begin{subfigure}{0.5\textwidth}
    [Captionless subfigure]
  \end{subfigure}
\end{figure}
\begin{figure}
  \begin{subfigure}{0.5\textwidth}
    [Captioned subfigure]
    \caption{Subfig caption for subfig}\label{fig:2}
  \end{subfigure}
\end{figure}
\end{document}