Multithreaded Generation not working as expected

	[Benchmark(Description = "Normal Generation")]
	[ArgumentsSource(nameof(BatchSizes))]
	public void Bench1(int batchSize)
	{
		var addressFaker = AddressFaker.Create();
		var buyerFaker = CompanyFaker.Create()
			.RuleFor(c => c.Addresses, (_, c) => addressFaker.RuleFor(a => a.CompanyId, c.EdcID).Generate(2));
		var orderEventFaker = EventFaker.CreateOrderFaker();
		var orderItemEventFaker = EventFaker.CreateOrderItemFaker();
		var customFieldOrderFaker = CustomFieldFaker.CreateOrderFaker();
		var customFieldOrderItemFaker = CustomFieldFaker.CreateOrderItemFaker();

		var orderItemBaseFaker = OrderItemFaker.Create();

		var orderFaker = OrderFaker.Create()
			.RuleFor(o => o.OwnerId, _ => OwnerId)
			.RuleFor(o => o.Buyer, _ => buyerFaker.Generate())
			.RuleFor(o => o.BuyerID, (_, o) => o.Buyer!.ID)
			.FinishWith((_, o) =>
			{
				o.Events = orderEventFaker.Generate(10);
				o.Events.ForEach(cf => cf.OrderId = o.ID);
				o.PackLines.ForEach(cf => cf.OrderId = o.ID);
				o.CustomFields = customFieldOrderFaker.Generate(10);
				o.CustomFields.ForEach(cf => cf.OrderId = o.ID);

				var items = orderItemBaseFaker.Generate(2);

				foreach (var item in items)
				{
					item.OrderId = o.ID;
					item.OwnerId = OwnerId;
					item.Events = orderItemEventFaker.Generate(10);
					item.Events.ForEach(cf => cf.OrderItemId = item.ID);
					item.CustomFields = customFieldOrderItemFaker.Generate(10);
					item.CustomFields.ForEach(cf => cf.OrderItemId = item.ID);
				}

				o.OrderLines = items;
			});

		var orders = orderFaker.Generate(batchSize);

		Console.WriteLine(orders.First().ID);
		Console.WriteLine(orders.Last().ID);
	}

	[Benchmark(Description = "Parallel Generation")]
	[ArgumentsSource(nameof(BatchSizes))]
	public void Bench2(int batchSize)
	{
		const int threadCount = 5;
		var batchSizePerThread = batchSize / threadCount;

		var addressFaker = AddressFaker.Create();
		var buyerFaker = CompanyFaker.Create()
			.RuleFor(c => c.Addresses, (_, c) => addressFaker.RuleFor(a => a.CompanyId, c.ID).Generate(2));

		var orderEventFaker = EventFaker.CreateOrderFaker();
		var orderItemEventFaker = EventFaker.CreateOrderItemFaker();
		var customFieldOrderFaker = CustomFieldFaker.CreateOrderFaker();
		var customFieldOrderItemFaker = CustomFieldFaker.CreateOrderItemFaker();

		var orderItemFaker = OrderItemFaker.Create()
			.RuleFor(it => it.Events, _ => orderItemEventFaker.Generate(10))
			.RuleFor(it => it.CustomFields, _ => customFieldOrderItemFaker.Generate(10));

		var baseOrderFaker = OrderFaker.Create()
			.RuleFor(o => o.OwnerId, _ => OwnerId)
			.RuleFor(o => o.Buyer, _ => buyerFaker.Generate())
			.RuleFor(o => o.BuyerID, (_, o) => o.Buyer!.ID)
			.RuleFor(o => o.Events, _ => orderEventFaker.Generate(10))
			.RuleFor(o => o.CustomFields, _ => customFieldOrderFaker.Generate(10))
			.RuleFor(o => o.OrderLines, _ => orderItemFaker.Generate(2))
			.FinishWith((_, o) =>
			{
				foreach (var ev in o.Events) ev.OrderId = o.ID;
				foreach (var pl in o.PackLines) pl.OrderId = o.ID;
				foreach (var cf in o.CustomFields) cf.OrderId = o.ID;

				foreach (var item in o.OrderLines)
				{
					item.OrderId = o.ID;
					item.OwnerId = OwnerId;

					foreach (var ev in item.Events) ev.OrderItemId = item.ID;
					foreach (var cf in item.CustomFields) cf.OrderItemId = item.ID;
				}
			});

		var orders = ParallelEnumerable.Range(0, threadCount)
			.SelectMany(_ =>baseOrderFaker.Clone().Generate(batchSizePerThread)).ToList();

		Console.WriteLine(orders.First().ID);
		Console.WriteLine(orders.Last().ID);
	}