使用 subcaption 包时图片编号不正确

Question

我似乎找不到图号问题的答案。我使用的是 subcaption 包，这应该是图 1a 和图 1b，但整个图在 pdf 中被标记为图 2，我可以通过引用来解决这个问题，但它仍然会将后续图移到错误的编号，例如第二个图现在是图 3，有人能看出我做错了什么吗？

\documentclass[fleqn,usenatbib,useAMS]{mnras}

% according to the author-year natbib style
\usepackage{natbib}

%
\usepackage{ragged2e}
%
\usepackage{graphicx}
\usepackage{color}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\usepackage{txfonts}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%\usepackage{subfig}

\usepackage{wrapfig}
\usepackage{subcaption}
\usepackage{cleveref}



\begin{document} 

\begin{figure*}
    \centering
    \begin{minipage}[t]{0.5\textwidth}
        \centering
        \includegraphics[height=4.6in]{HR_nonrot.png}
        \subcaption{models without rotation}
            \label{fig:HRDnrot}
    \end{minipage}%
    \begin{minipage}[t]{0.5\textwidth}
        \centering
        \includegraphics[height=4.6in]{HR_rot.png}
        \subcaption{models with rotation at v$_{\mathrm{ini}}$=0.4v$_{\mathrm{crit}}$ (red solid lines)}
        \label{fig:HRDrot}
    \end{minipage}
    \caption{
    Evolutionary tracks of models in the mass range $9\msun \leq \mini \leq 120\msun$ until the end of He-burning. Key evolutionary stages are indicated.}
\end{figure*}

\end{document}