Cross Currency Journals with Source Payables

Hi Folks,

We have payment created and reconciled with CM statement line. When we do the "Payables Transfer to GL", we observed that few journals are created with Category "Cross Currency" and "Source "Payables".

But, here the invoice currency and payment currency are same and there is no difference in the exchange rates(between payment date and cash clearing date).  Can you please help us to understand why these entries are created.

--> Invoice is created in "USD"

--> Payment is created in "USD"

--> Payment is cleared from Bank Account which has the functional currency "MXN"

Thanks

Shashi