AME : no notifications sent to approvers when using only approval group chain of authority

Hi,

in AME i have a rule that uses only approval-group chain of authority

3 approval groups based on roles including employees.

it shows the approvers names in the review page but does not send notifications to any of them.

and writes the transaction to HR without any approval.

however it sends all notifications properly if I add a supervisor level approver to the group above.

sample of one approval group

Select 'PER:'|| PERSON_ID

From PQH_ROLE_USERS_V1 aa

Where Role_Name = 'HR_SERVICES'

Thank you

Nat