If you edit a related object with "AdvancedObjectRelationList=enabled", the changes will be lost after publishing

Steps to reproduce

1. Edit site.ini and add the following settings

   [BackwardCompatibilitySettings]
   AdvancedObjectRelationList=enabled
   

2. Clear the caches
3. Make a copy of the article class and name it "New Article"
4. Add an "Object Relations" attribute to "New Article"
5. Create a new "New Article" content object and Add some existent content to its "Object Relations" attribute. Publish it.
6. In the front end, open the newly created content object and edit it.
7. Select one of the items in "Object Relations" attribute and edit it.
8. Change the title of related object to something else.
9. Click the publish button.
   The changes to the title of the related object will be lost.

Repeat the steps above, but:

1. Do not change the title
2. Change any other field instead