Not receiving 'Supplier contact change request' and 'supplier address change request' notifications

Hi,

We are on R12.2

We receive most of the notifications in our mail boxes.

However, we are not receiving notifications set up at the below navigation.

Purchasing super user > Setup > Profile management configuration >setup notification subscription.

'Supplier contact change request' and

'supplier address change request'

Can you please advice what might be wrong.

thank you,

Daniela