Purchases of items created in maintenance orders are not displayed at reception

Summary

Purchases of items made from maintenance orders, where the request and purchase order are duly approved, I can not see them in receipt of inventories

Content

From a maintenance order I create a purchase request, this request is duly approved, subsequently the process and generate a purchase order using this request, and it is duly approved reaching the open state, going to my receptions, I can not see the reception of this purchase order.

My main inconsistency is that some purchase orders do arrive at reception, coming from the same maintenance organization, having as a variant the purchase of a different item, that is, there are purchases of some items that I can receive, and purchases of other items that I cannot. are displayed at reception.