\textvisiblespace disappears when using luatex

[ytzemih]

I quite like this theme, thanks in the first place. Just wanted to post a small issue, I recently discovered:

\documentclass{beamer} \usetheme{metropolis} \begin{document} \begin{frame} \textvisiblespace \end{frame} \end{document}

Compiling that MWE with pdflatex works fine, but with luatex, the command \textvisiblespace does not produce any visible output anymore.

I was not able to tell what's going on here. Can anyone reproduce that issue? Thanks for having a look.