(Odoo 15 CE) Expense products appear on the invoice as reimbursed (one line for debit and one line for credit).

For some reason, my expense products are being reimbursed on the invoices.

This is my current config:

Invoices default journal:
Name: Customers (Invoices)
Type: Revenue
Allow reconciliation: No

Example configuration of the Expense product:
Name: APOSTILLE
Price: $50
Can be sold, Cannot be purchased.
Re-invoice expenses: Selling price
Income account: Cases to be invoiced
Expense account: Invoiced cost not accrued

Configuration of the above accounts:

Cases to be Invoiced:
Type: Current Assets
Allow reconciliation: No

Invoiced cost not accrued:
Type: Cost of revenue
Allow reconciliation: No

John Smith creates the Expense to be paid by the company, and the entries are validated. 

The invoice is created, with that expense, and with the above configuration, the following invoice lines are generated.

Line 1:
Product: APOSTILLE
Description: APOSTILLE
Account: Invoiced cost not accrued
Amount: $50

Line 2:
Product: APOSTILLE
Description: John Smit: APOSTILLE
Account: Cases to be Invoiced
Amount: -$50

And the following accounting entries are generated:

Line 1:
Account: Invoiced cost not accrued
Tag: APOSTILLA
Debit: $0
Credit: $50

Line 2:
Account: Customer Receivable
Tag: N/A
Debit: $0
Credit: $0

Line 3:
Account: Cases to be Invoiced
Tag: John Smit: APOSTILLE
Debit: $50
Credit: $0

So the expense is being reimbursed to the customer, but as I understand the accounting entries are ok?

Thank in advance for the attention and help that you can offer me.

Greetings.