Equation numbers in document class amsart appear in the margin

[AlexanderZeilmann]

A picture probably explains the bug best:

Everything is respecting the margin - like normal equation numbers (green box), or text in the awesome box - except for equation numbers in awesome boxes (red box). It would be nice if the equation number would also respect the margin. For the document class article the bug does not appear.

\documentclass[reqno]{amsart}
\usepackage{awesomebox}
\usepackage{showframe}
\usepackage{mwe}

\begin{document}
    \lipsum[1][1-4]
    \begin{equation}
        a^2+b^2=c^2
    \end{equation}
    \notebox{
        \lipsum[2][1-4]
        \begin{equation}
            a^2+b^2=c^2
        \end{equation}
        \lipsum[3][1-4]
    }
    \lipsum[4][1-4]
\end{document}

Thank you for the nice package btw :)