Foliage's Landscape Layers are not reflected when Landscape is rotated

float ULandscapeComponent::GetLayerWeightAtLocation(const FVector& InLocation, ULandscapeLayerInfoObject* LayerInfo, TArray<uint8>* LayerCache)
{
... 1991
// Find location
// TODO: Root landscape isn't always loaded, would Proxy suffice?
if (ALandscape* Landscape = GetLandscapeActor())
{
    const FVector DrawScale = Landscape->GetRootComponent()->GetRelativeScale3D();
    const FRotator DrawRotator = Landscape->GetRootComponent()->GetRelativeRotation(); //add
    FVector TestPosition = ((DrawRotator.UnrotateVector(InLocation - Landscape->GetActorLocation())) / DrawScale); //add

    float TestX = TestPosition.X - (float)GetSectionBase().X; //add
    float TestY = TestPosition.Y - (float)GetSectionBase().Y; //add

    // Abort if the test location is not on this component
    if (TestX < 0 || TestY < 0 || TestX > ComponentSizeQuads || TestY > ComponentSizeQuads)
    {
        return 0.0f;
    }
...
}