Issue with setting `initialValue` containing `/` in a schema field.

const media = {
  size: [
    {
      title: '1/4',
      value: '1/4'
    },
    {
      title: '1/2',
      value: '1/2'
    },
    {
      title: '3/4',
      value: '3/4'
    },
    {
      title: '1/1',
      value: 'full'
    }
  ]
}

{
  title: 'Media Size',
  name: 'mediaSize',
  type: 'string',
  description: 'Controls the size of the media in relation to the display grid',
  validation: (rule) => rule.required(),
  options: {
    list: media.size,
  },
  initialValue: 'full',
}