BeginBox sticking out of its indent level

[tomtomjhj]

Hi, thanks for nice package. I noticed that after e5ea726, if the highlight box created by \BeginBox contains an indented block (e.g., \If), it escapes its indent level (reset to 0) and covers the indent guide.

Here is a minimal reproducer (tested on ubuntu 22.04):

\documentclass{article}
\usepackage{algpseudocodex}

\begin{document}

\begin{algorithmic}[1]
  \While{asdf}
    \State asdf
    \BeginBox[fill=yellow]
    \If{asdf}
      \State asdf
    \EndIf
    \EndBox
    \State ...
  \EndWhile
\end{algorithmic}

\end{document}

Before e5ea726 (expected behavior):

After e5ea726 (current, broken behavior):

[chrmatt]

Thanks for the detailed report! As a workaround until it gets fixed, I suggest to end the box inside the if block:

\BeginBox[fill=yellow]
\If{asdf}
  \State asdf
  \EndBox
\EndIf