Control-eject shortcut does not work when Karabiner-Elements is running

It’s an issue of macOS, and unfortunately, Karabiner-Elements cannot avoid this issue.
Instead, please change fn+escape to eject and use control+fn+escape (== control+eject) shortcut.

  1. Import Change escape key.
  2. Enable Change fn+escape to eject.
    You can use control+fn+escape as control+eject.