I believe queue manipulator does some handling of the classes of the character header, right? I’m seeing a bug where my radicals (during the lesson quiz, not the regular lesson part) are colored as vocabulary because the div with class character-header and attribute data-controller="quiz-header" is getting both the character-header--vocabulary and character-header--radical classes.
Sadly I don’t have any more radicals to test with after writing this message, sorry.