Well from what I can see on the website about TRV the whole point of applying for it is so that you CAN come back into Canada as you will have that status to show...
"If you are a temporary resident in Canada with valid status (that is, you have a valid study permit or work permit Yes I will have a OWP by then), you can apply for a new temporary resident visa to return to Canada before you leave."
It Just makes perfect sense, as long as you have a OWP and then you apply for the TRV and then you are approved that is the legal way of doing it.