MWE:
\documentclass{article}
\usepackage{microtype}
\renewenvironment{quote}
{\list{}{\leftmargin0.5cm \rightmargin0cm}
\item\relax\fontsize{9.8pt}{11.4pt}\selectfont}
{\endlist}
\begin{document}
\begin{quote}
When \\
When
\end{quote}
\end{document}
This leads to unjustified lines/letters:
The problem does not appear if I add \par and move the \fontsize command, but this also slightly affects vertical spaces:
\renewenvironment{quote}{\par
\fontsize{9.8pt}{11.4pt}\selectfont
\list{}{\leftmargin0.5cm\rightmargin0cm}
\item\relax}
{\endlist}
My question is related to much older ones, see here or here or here, and apparently there have been fixes introduced (I use TeX Live 2021) but I'm still not able to figure out a solution. How is the correct way to change the quote environment as I intend to?

