Can't protect inner fields of a multifield if PropertyNameDecorator is configured

Steps to reproduce

Configure a form field like the following:

properties:
  - name: typeExternal
    $type: compositeField
    propertyNameDecorator: info.magnolia.ui.field.PrefixNameDecorator
    i18n: false
    itemProvider:
      $type: currentItemProvider
      createIfMissing: true
    properties:
    - name: LinkText
      i18n: true
      $type: textField
    - name: Link
      i18n: true
      $type: textField
    - name: LinkTarget
      label: Target
      i18n: true
      $type: textField

Afterwards, trying to protect one of the inner fields won't apply the defined PropertyNameDecorator nor combine the composite field name with the inner field's name.

Expected results

Property name is properly generated and protects the field in question.

Actual results

Name generated ignores the configured PropertyNameDecorator, resulting on an incorrect property to be ignored.

Workaround

Removing the PropertyNameDecorator makes the issue inexistent, so in case of it not being necessary for the use case, removing it works as a workaround.

Development notes