3826107 - Why does an individual with the Role : Purchase Request Processor(Audit) can only view his own Purchase Request

Issue: User with Purchase Request Processor (Audit) assigned to all group does not have visibility from other Purchase Request submit by other users. Only his own request is only visible from her.
What is the reason for this, is that a defect?

System has one limitation that the ability of ‘Purchase Request Processor(Audit)’ to view existing purchase requests is only activated if user DOES NOT have ‘Purchase Request User’ role assigned. , KBA , CON-CA , Cross Applications , Problem