I literally check on baby every 30 mins. As long as it has an air supply, it can’t suffocate by shrink wrapping, right? I never realized the amount of things that could go wrong.
If you are keeping the humidity high in the bator and keeping the membrane moist when needed you shouldn't have any problems with shrink wrapping, if not it'll be very hard for the duckling to get out of the shell, they can suffocate if their air hole isn't big enough, but I cant see your picture well enough to see the hole.