For dvisvgm backend, position tracking gets broken upon coloring within node

[HyunggyuJang]

Brief outline of the bug

Partial \coloring of node text corrupts position tracking for the following texts.

Minimal working example (MWE)

For example

\documentclass[tikz, dvisvgm]{standalone}
\begin{document}

\begin{tikzpicture}
\node[draw, circle] {test {\color{blue!50}coloring}!};
\end{tikzpicture}
\end{document}

results to

while when it comes to dvipdfmx backend,

\documentclass[tikz, dvipdfmx]{standalone}
\begin{document}

\begin{tikzpicture}
\node[draw, circle] {test {\color{blue!50}coloring}!};
\end{tikzpicture}
\end{document}

TikZ produces the figure correctly as following

Note that if I set color for the subsequent text after local coloring, this kind of malfunction disappears. I.e., rather than

\node[draw, circle] {test {\color{blue!50}coloring}!};

the following corresponds to that from dvipdfmx version:

\node[draw, circle] {test {\color{blue!50}coloring}{\color{.}!}};

[muzimuzhi]

Don't know how I find this (by searching for color in pgfsys-dvisvgm.def?) but letting \pgfsys@text@to@black@hook to empty (its default definition) seems to work. It is currently defined as https://github.com/pgf-tikz/pgf/blob/28b9756fef06fc59ebee7241261ebd0e51d83c21/tex/generic/pgf/systemlayer/pgfsys-dvisvgm.def#L136-L141 for dvisvgm and is empty for any other drivers. This macro was added in https://github.com/pgf-tikz/pgf/commit/b7447e057a83a0dd95e4f83813060805e00d2756, Mar 2016, with comment https://github.com/pgf-tikz/pgf/blob/28b9756fef06fc59ebee7241261ebd0e51d83c21/tex/generic/pgf/systemlayer/pgfsys.code.tex#L467-L470

I don't see how color "black" is special, in dvisvgm v2.11.1. (Perhaps that was caused by an already fixed dvisvgm bug?) Also I wonder why raw <g> is both opened and closed first, rather than raw <g> ... \set@color ... \reset@color ... raw </g>?

[HyunggyuJang]

Thanks, I can confirm that with latex preamble of

\makeatletter
\def\pgfsys@text@to@black@hook{}
\makeatother

The raised malfunction has gone. I hope the resolution gets merged to upstream in a day!