What if ircc runs a quick cbsa check on sponsor before issuing DM and they find out he/she is not present in Canada...? This would open a whole new can of worms the Sponsor will now have to prove his intent to return...just sayin
She is a Canadian and not obligated to remain in Canada for spouse sponsorship. So even if they do check, which I strongly believe they don't ans they have many others things to do, there shouldn't be any problems.