[BUG]Why after scaling down bone collision is still there?

Hello,
it is possible to give PBO option as a parameter to HideBoneByName( FName BoneName, EPhysBodyOp PhysBodyOption ),
but if I take a look in the Engine-Implementation it doesnt do anything:

From “Runtime\Engine\Private\Components\SkinnedMeshComponent.cpp”:

void USkinnedMeshComponent::HideBone( int32 BoneIndex, EPhysBodyOp PhysBodyOption)
{
	if (ShouldUpdateBoneVisibility() && BoneIndex < BoneVisibilityStates.Num())
	{
		checkSlow ( BoneIndex != INDEX_NONE );
		BoneVisibilityStates[ BoneIndex ] = BVS_ExplicitlyHidden;
		RebuildVisibilityArray();
	}
}
//...

void USkinnedMeshComponent::HideBoneByName( FName BoneName, EPhysBodyOp PhysBodyOption )
{
	// Find appropriate BoneIndex
	int32 BoneIndex = GetBoneIndex(BoneName);
	if ( BoneIndex != INDEX_NONE )
	{
		HideBone(BoneIndex, PhysBodyOption);
	}
}