TYPO3 Core

Custom CSS file is ignored if filename is "rte.css"

This does not work:

editor:
  config:
    # Include custom CSS
    contentsCss: "EXT:my_extension/Resources/Public/Css/rte.css" 
  }
}

This works:

editor:
  config:
    # Include custom CSS
    contentsCss: "EXT:my_extension/Resources/Public/Css/custom_rte.css" 
  }
}