Renaming Sprite Actor in Struct Blueprint, and closing the Editor causes de-reference

Paper Sprite actor set as a Default Value in a Blueprint Struct is set to none, when the sprite is renamed, saved, and the Engine is restarted.

1. Open QAGame
2. Create an Actor blueprint named "NewBlueprint"
3. Create a Blueprint Structure "Bp_Struct"
4. Open Bp_Struct, change the default property to NewBlueprint class reference
5. Set the default value of the member to NewBlueprint
6. In content browser rename the Actor class "Renamed_Blueprint"
7. Save All & Close out of the Editor.
8.  Re-open Editor and Open Bp_Struct.

Results: The default value is none

Expected: The default value would be correctly Renamed_Blueprint