Why doesn't Bitrix reserve a product when creating an order via API?

Question

1C-Bitrix

Good afternoon. I create an order through the API, nothing special, everything is as in the training manual (training manual ) .
The order is created successfully, but for some reason the product is not reserved.
In the settings of the product and the "Trade catalog" module, quantitative and warehouse accounting are enabled, a warehouse is created, and it is also set to reserve goods when creating an order.
But when creating an order from the admin panel, the goods are reserved. When creating an order via the API, do you need any additional manipulations to reserve the goods?
Thank you.