Complex fields with Internalisation are not protected correctly

Steps to reproduce

1.  Create a site with that supports two languages (f.e. en and de)
2.  Create a page that contains the following dialog (it can be a page dialog or a component dialog), for example, mtk2: componets/htlm

   form:
     properties:
       equivalents:
         $type: jcrMultiField
         field:
           $type: compositeField
           properties:
             equivalentLink:
               $type: pageLinkField
             equivalentTitle:
               $type: textField
               i18n: true  
   

1. Create a page in this site and add an html component to it. Fill out the component in both languages
2. Create a new site for a livecopy, this site is going to have only one language.
3. Follow livecopy instructions to allow internationalization (docu).
4. Create a livecopy of the original site.
5. Go to the html component and try to edit and protect the complex field. Save changes.
6. Open again the html dialog.

   Expected results

The field is protected and a red icon appears next to the complex field.

Actual results

No icon red icon appears

Workaround

Only add default language content into complex fields in the master site.

Development notes

The protected icon is not displayed properly because of the internationalised properties that are within the complex field.
If you go to the master and save the dialog only in the fallback language, it works as expected.