babel/spanish with natbib causes hooks error

[John02139]

\DocumentMetadata{%
	pdfstandard=a-4f,
	pdfversion=2.0,
	lang=en-US,
	testphase={phase-III},
}
\documentclass{article}
\usepackage[T1]{fontenc}

\usepackage{natbib}

\usepackage[spanish,main=english]{babel} 
%\usepackage[french,german,polish,japanese,main=english]{babel} 

% spanish triggers ! LaTeX hooks Error: Generic hooks cannot be added to '\@lbibitem', if natbib is loaded
% french, german, and various other languages do not trigger this error.

\begin{document}
\section{Introduction}
    Some text.
\end{document}

[u-fischer]

similar to the previous issue with french. Here it is the active >.