I just would like to let you know that unfortunately the Fix to the print under dark theme is not solved, or has actually returned. I’m using Google Chrome x64, latest version, along with Windows 10 1803.
This was first addressed in an old Weekly update thread, link below. Weekly update: 2017 week #15 (April 17, 2017).
Additionally, I noticed that if I export the text and copy it to the clipboard, then paste it in Word keeping the source formatting, I have also the dark background applied on it.