Skeleton not saving UPROPERTY()

Development Programming & Scripting C++
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1

I’ve added a property in Skeleton.h:



//                Additions                //
public:

    UPROPERTY(BlueprintReadOnly, Category = "Universal Rig")
    UUniversalRig* RigDefinition = nullptr;

In USkeleton::USkeleton() in the cpp



    if (!RigDefinition)
    {
        UE_LOG(LogTemp, Warning, TEXT("New RigDefinition. Skeleton::Skeleton()"));
        RigDefinition = NewObject();
        RigDefinition->InitUniversalRig(this);
    }

In UE4 editor, it’s saved, I can close the SkeletonEditor tab and reopen it, and it’s still the same object.
When I close the UE4 editor and reopen though, the pointer has been nullified. When the USkeleton::USkeleton() is called, it successfully creates a new object.
But trying to access that object for via IDetailsView->SetObject(), it crashes the editor with “EXCEPTION_ACCESS_VIOLATION” even though it has



DetailsView = FModuleManager::GetModuleChecked("PropertyEditor").CreateDetailView(DetailsViewArgs);
    if (InRigAsset)
    {
        UE_LOG(LogTemp, Warning, TEXT("Rig Asset is valid (UniversalRigEditor::Construct())"));

        DetailsView->SetObject(InRigAsset);

        ChildSlot
        
            SNew(SVerticalBox)
            + SVerticalBox::Slot()
                .AutoHeight()
                
                    DetailsView.ToSharedRef()
                ]
        ];
    } else
    {
        UE_LOG(LogTemp, Warning, TEXT("Rig Asset is null"));
    }

I’m self taught when it comes to programming, so there’s a lot of critical knowledge I simply don’t have I’m sure, but it’s my understanding that all UPROPERTY() variables are serialized, so I’m at a bit of a loss.