I'm not sure what you mean by SSHR...are you able to see other FYI notifications? If not, they may be disabled at the mailer level...
See if this note will help you, specifically the AUTOCLOSE part under WFMAILER - How To Disable FYI Approval Notifications (Doc ID 270652.1)
Has the POAPPRV workflow been modified? I have you attempted to trace the process?
No. I have dropped the plan.