ISR not showing up in FB60

I have maintained the ISR number in the vendor master under the 'Payment Transactions' Tab, activated the ISR option in the Editing options plus one of the payment methods assigned to the vendor is ISR relevant but I still did not get the fields for ISR in FB60? Works correctly in MIRO though.

We already have the 1154488 - FB60: ISR default value "*" no longer displayed note implemented in our system (ECC 6 EHP 7)

Does anyone know what could be missing?