Maybe because there is no more danger that deserve assylum !Exactly, that's what I think too.
How come suddenly is able to go back to his_her home country while it was impossible with the refugee case.
It's a risk
also, if he had a case that required protection he would have received a positive decision but he had a refusal so the reasons of his assylum application does not deserve the protection of canada !
I'm not an expert but I don't see any misrepresentation ! he got his PR under another stream so he can travel to his country of origin without any problems