Setting itemindent with enumitem brings labels out of vertical alignment / alternatives to enumitem

Question

I recognize this is a bad question but I am quite desperate and thought someone might be able to at least point me in the right direction.

When I add a value for itemindent, \setlist[1]{leftmargin=0.25in, itemindent=14pt} , it causes the first item label to be out alignment with the rest of the item labels like so:

1. Text text text 
     2. text text text
     3. text text text

When I remove the itemindent specification, all labels are vertically aligned again. Also, this only affects the first level, as in \setlist[2]{leftmargin=0.25in, itemindent=14pt} works fine.

Unfortunately, I cannot provide a minimum working example because it compiles correctly on my local environment; it's when I compile in my Heroku web application that they become messed up. I'm compiling using latexmk and lualatex.

Concrete Questions

1. My suspicion is some other setting is conflicting with the first item of the first list somehow, but what could this be? The full class file is here.

2. Is it possible to set the itemindent for every paragraph in the document outside of enumitem?

3. I am near giving up on tracking down this bug... is there an alternative to enumitem that can provide similar list spacing customization?

Answer 1

The core of the problem is that the class uses \\ at the end of paragraphs (or that you use \\ at the end of paragraphs in the text ...).

It uses also ragged2e and this package redefines \\ to actually produce paragraphs, and uses a hook to insert a \OmitIndent at the next paragraph begin. This hook now spills over to the enumerate.

\documentclass{article}
\usepackage{enumitem}
\setlist[1]{leftmargin=0.25in, itemindent=14pt}

\RequirePackage{ragged2e}
\RaggedRight


\begin{document}    
abc\\

\begin{enumerate}
\item a
\item b
\item c
\end{enumerate}

abc\\
abc

\begin{enumerate}
\item a
\item b
\item c
\end{enumerate}
\end{document}

If you can't remove the faulty \\ you can avoid the problem by clearing the hook before the enumerate:

\AddToHook{env/enumerate/before}{\ClearHookNext{para/begin}}

But it would better if the class is corrected as this can affect other places too.