Custom static mesh not visible on server until manually attached to root

Development Asset Creation
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1

Hi,
I have tested this on simple c++ flying template.
I have created a custom static mesh component. This is how constructor looks like:

UMyStaticMeshComponent::UMyStaticMeshComponent(const FObjectInitializer& ObjectInitializer)
    	:Super(ObjectInitializer)
    {
    	struct FConstructorStatics
	{
		ConstructorHelpers::FObjectFinderOptional<UStaticMesh> Mesh;
		FConstructorStatics()
			: Mesh(TEXT("/Game/StarterContent/Shapes/Shape_NarrowCapsule.Shape_NarrowCapsule"))
		{
		}
	};
	static FConstructorStatics ConstructorStatics;
	SetStaticMesh(ConstructorStatics.Mesh.Get());
	SetCollisionEnabled(ECollisionEnabled::NoCollision);
}

This is how I created it inside the constructor of a pawn:

TestMesh = CreateDefaultSubobject<UMyStaticMeshComponent>(TEXT("TestMesh"));

If I don’t attach TestMesh to RootComponent, then the TestMesh is only visible in clients. If I attach it, it is working fine (visible in both server and client).

TestMesh->AttachTo(RootComponent);

Why is this happening that it is only visible in clients. Is this a bug? What should be the correct behaviour.

Thanks
Anicka