FX rate difference on Auto Foreign Payment

E18.10 TL 8.98.1.3 HTML

Can someone assist with an FX issue regarding a foreign payment made via auto payments?
When the CA ledger to the bank payment posts the equivalent AA ledger transaction does not use the exact current FX rate, so causes a bank rec difference.

 

See example below: (EUR payment, base currency GBP)

 

Supplier account has a number of vouchers using two different Euro FX rates. (old rate 1.15 and new rate 1.20)

 

When an auto payment is done to clear these vouchers from the ledger the following happens:

 

CA ledger of bank and creditors get charged according - OK

The equivalent AA ledger of creditors also clears as expected, using the differing rates – OK