Packaged project fails to open with instanced object pointer and blueprint nativization

When a class contains an instanced pointer to an object class, nativizing a blueprint with the object property set causes a packaged version of the project to fail to open.

1. Open UE4 Editor (any project)
2. Add two code classes to project based on Actor and Object (MyActor & MyObj)
3. Open MyObj.h and add the following to the UCLASS macro

   DefaultToInstanced, EditInlineNew, BlueprintType 
   

4. Add the following to MyActor.h:

   UPROPERTY(EditAnywhere, Instanced, Category=Prompt, BlueprintReadOnly, meta = (AllowPrivateAccess = "true") )
    class UMyObject* PromptMyObject;
   

5. Compile
6. Create blueprint based on MyActor (MyActorBP)
7. Open MyActorBP and set PromptMyObject to My Obj
8. In Class Settings, check the box for Nativization
9. Open Project Settings and set "Blueprint Nativization Method" to Exclusive
10. File->Package Project->Windows->Windows (64-bit)
11. Navigate to and run packaged .exe file

Result:
Package will fail to run due to failed cast to MyObj