Underline trouble

[Keks-Dose]

The issue is described here: https://tex.stackexchange.com/q/714887/4736

MWE:

\documentclass{article} \font\foo="name:GaramondLibreRegular:letterspace=50;" \usepackage{lua-ul} \begin{document} \foo \underLine{Gestattungsvertrag} \end{document}

Unwanted gaps in the underlined word. Solution suggested here: https://tex.stackexchange.com/a/714897/4736 is to change lua-ul.lua, but maybe luaotfload contains the bug.

[zauguin]

This should be resolved with on dev with fe766fdb.