UInstancedStaticMeshComponent::AddInstances does not appear to be adding per-instance previous transforms when enabled

Instanced static mesh component does not add instances transforms to PerInstancePrevTransform array when using UInstancedStaticMeshComponent::AddInstances. Additionally Updating the transforms of the instances also does not add them to the array.

Licensee includes proposed fix in question.

From Lisencee:
Create an actor in c++ with a UStaticMesh property. Insert following code in BeginPlay:

UInstancedStaticMeshComponent *ISM = NewObject<UInstancedStaticMeshComponent>(this);
ISM->SetStaticMesh(MyStaticMesh);
ISM->SetHasPerInstancePrevTransforms(true);
ISM->SetMobility(EComponentMobility::Movable);
ISM->RegisterComponentWithWorld(GetWorld());

TArray<FTransform> Transforms;
Transforms.SetNum(10);
ISM->AddInstances(Transforms, false);

Create blueprint child of c++ actor. Set Static Mesh property, add it to the world and start PIE session.

Debug and observe ISM's PerInstancePrevTransform array is empty. Also test using:

for (FTransform Transform : Transforms)

{     ISM->AddInstance(Transform, false); }

To confirm actual expected outcome.