Invoice Journal Entries - Accounts affected

Hello, 

When we release a project Invoice for a Stock item shipment, the journal entry usually generates four transactions. 

1. Trade Receivable (Debit)
2. Revenue - Piles (Credit)
3. Shipped - Unbilled Accounts Receivables (Credit)
4. Inventory Materials (Debit)

However, there is a project in which the invoice journal transaction is not generating the two last transactions. We want to understand why is it not affecting “Shipped - Unbilled accounts receivables” and “Inventory materials” accounts, despite all projects follow the same workflow. 

Thanks