side effect of the combo lookup

[u-fischer]

Playing around I found a sideeffect of a combo-font on the following text (compiled in texlive 2017). The width of some chars are wrong, wenn the combo font is used. The effect disappears if lmroman is used once before the combo font (either as \normalfont or through the command \one).

\documentclass[]{article}

\font \one = {file:lmroman10-regular.otf:mode=node} at 10pt 
\font \two = {file:lmsans10-regular.otf:mode=node}  at 15pt 
\font \onetwo = "combo: 1 -> \fontid \one            ;
                        2 -> \fontid \two , 0x41-0x5A; 
                        "

\begin{document}
%Some Text with Capital Words
%{\one a}
{\onetwo Some Text with Capital Words}

Some Text with Capital Words

\end{document}

[u-fischer]

No longer reproducible in texlive 2018/luaotfload 2.91. So I'm closing the issue.