Uppercased section titles produce hyperref warning when tagging is active.

[John02139]

Section titles can be made uppercase by adding \MakeUppercase to the 6th argument of \@startsection (noted in source2e, pg. 901). The following does this, but if tagging is active, a warning results.

\DocumentMetadata 
{
	testphase = {phase-III,firstaid},
	pdfstandard = ua-2,
	pdfversion  = 2.0,
	lang = en-US,
}
\documentclass{article}

\usepackage{etoolbox}
\patchcmd{\section}{\bfseries}{\bfseries\MakeUppercase}{}{}

%% same result this way, as expected
%\makeatletter
%\renewcommand\section{\@startsection {section}{1}{\z@}%
%                                   {-3.5ex \@plus -1ex \@minus -.2ex}%
%                                   {2.3ex \@plus.2ex}%
%                                   {\normalfont\Large\bfseries\MakeUppercase}}
%\makeatother

\usepackage{hyperref}

\begin{document}
\section{A short section}\label{sec:1}
Text in Sect.~\ref{sec:1}.
\end{document}

With tagging, the following appears

Package hyperref Warning: Counter 'SECTION' or the representation '\theHSECTION`
(hyperref)                don't exist. No target created. on input line 23.