Siunitx conflicts with textbf

Question

I've recently updated my computer from TeXLive 2019 to TeXLive 2022, and a document that compiled perfectly with the 2019 version raises an error with the new version. The problem occurs when i try to use the \ohm unit (defined in the siunutx package) inside a \textbf command, but the strange thing is that using the \farad unit the problem does not arise.

\documentclass{article}
\usepackage{siunitx}

\begin{document}
$ \si{\textbf{\farad}} = \si{\coulomb \per \volt} $ → no problem

$ \si{\textbf{\ohm}} = \si{\volt \per \ampere} $ → raise an error

$ \si{\ohm} = \si{\volt \per \ampere} $ → no problem
\end{document}

I'm using the $ ... $ because in other parts of the document I have to make some operations with these units, and also because this ensures the correct spacing.

Answer 1

Use \mathbf not \textbf, since \Omega is not "text". An error would likewise occur if you had merely typed $\textbf{\Omega}$, in the absence of siunitx.

\documentclass{article}
\usepackage{siunitx}

\begin{document}
$ \si{\textbf{\farad}} = \si{\coulomb \per \volt} $ → no problem

$ \si{\mathbf{\ohm}} = \si{\volt \per \ampere} $ → raise an error

$ \si{\ohm} = \si{\volt \per \ampere} $ → no problem
\end{document}