fail to render focus in code block when config both dark and light markdown theme

[ylw5]

When I config only one theme, it works

  markdown: {
    theme: 'vitesse-dark',
  },

When config both dark and light markdown theme, it can't work

markdown: {
  theme: {
    dark: 'vitesse-dark',
    light: 'vitesse-light',
  },
},