LevelInstance Property overrides are broken when duplicating a LI

Upon light debugging, it seems like the overrides depend on the name of the actors in the LI. The duplicated LI does have FLevelInstanceActorPropertyOverride but the Actor names were not updated updated when the LI was duplicated.

• create a LevelInstance with few cubes
• Add a couple of instances in a WP level
• Override the material of one of the cubes in an instance
• Duplicate the LI instance
  • Select and CTRL+D 
  • Select and ALT+Drag on one axis

The cube in the duplicated instance will revert to the default material