My visa expired last year itself. I already extended my study permit but not Visa. I requested to extend visa just now but then I got PPR for my PR. Yes, they requested to send passport for Temporary Resident Visa (study visa) extension as well, but by that time I had already sent my passport after PPR and it had reached ottawa. May be it was sitting on the next table when one officer requested passport for study visa.
I think TRV and PR is taken care by two different offices in Ottawa. or probably since I had already paid for TRV, they requested the passport anyway.