AP Invoice Tolerance configuration in the Shipment Amount: functionality

We have been performing testing for AP Invoice Tolerance configuration and found below oracle note:

Shipment Amount. 

The amount of variance you allow between an invoice amount and the amount of the purchase order shipment to which it is matched. If either amount is in foreign currency, Payables compares the functional currency amounts by using the exchange rates of the invoice and purchase order shipment,

for the Shipment amount. But when we tried test the tolerance for USD against the functional currency of Indonesian currency, system is not considering the exchange rate and it allows more than the tolerance limit.