Passport requested for work permit

[combinatorial]

Hi all,

I have been asked to mail in my passport following the approval of my work permit application.
However, I already have a valid Temporary Resident Visa from earlier this year (applied separately).

This webpage says that I should get the work permit at the port of entry, with no mention of mailing the passport.
I am a citizen of Lebanon and applied online from the US.

Has anyone encountered this before?

Thanks!