Things have changed a lot lately due to COVID. Earlier when the COPR was issued, especially for inland applicants, they had to surrender all existing permits (study / work) and all existing visas were cancelled.
If you submit your passport for PR visa, then your visitor's visa will not be cancelled per se since you are not a PR until you land in Canada and are admitted. Only after you become a PR, your do not need a visa and all visas/ permits will be cancelled, if not physically, then in the system, .