The horizontal alignment of margin notes in framed theorem-like environments when combined with XeLaTeX

[Kazuhiko Sakaguchi]

Description

An extra indentation appears only when we combine kaobook with XeLaTeX.

Minimal Working Example

\documentclass[
  a4paper,
  fontsize=10pt,
  twoside=false,
  secnumdepth=2,
  numbers=noenddot,
  fontmethod=tex,
]{kaobook}

\usepackage[framed]{kaotheorems}

\begin{document}

Some text.\marginnote{marginnote 1.}

\begin{theorem}

Some text.\marginnote{marginnote 2.}

\end{theorem}

Some text.\marginnote{marginnote 3.}

\end{document}

Expected behavior (what I got with pdfLaTeX):

The horizontal position of all the margin notes should be the same, like this:

Actual behavior (what I got with XeLaTeX):

[Kazuhiko Sakaguchi]

I found a solution to this issue here: https://tex.stackexchange.com/questions/269426/wrong-marginnote-positions-inside-a-tikzpicture-with-xelatex