it does still freeze but it only freezes on the ground. my thought was that the original change was just to prevent kelvin from solo securing it but you could be right as well.
doesn't seem to be a bug to me. It does freeze the urn on the ground but it looks like allies can deposit it while in his ult regardless if they door in or were there to begin with.
I just provided a video example of the rescue beam issue. you also cant activate any "point and click" item through the door either such as slowing hex. hope it gets addressed because It would be really fun to play rescue doorman.