text structures jump out of inline math

[u-fischer]

Unlike display math, inline math doesn't disable para tagging and so some structures jump out of the math:

\DocumentMetadata{testphase={phase-III,math,table}}

\documentclass{article}
\begin{document}

$%\tagpdfparaOff
  a = 
  \mbox{\LaTeX \begin{tabular}{l}a\end{tabular}} 
  \begin{tabular}{l}b\end{tabular} 
  \parbox{3cm}{some text}
$ 

\end{document}

with para tagging disabled it looks ok (if one ignores the open question how AT handles substructure of Formula)