I am with Bob Johansson (Bobbyverse) on this one. Star trek is utterly inconsistent with how transporters work. They only ever play up when it’s convenient for the plot line, but the rest of the time they’re totally fine and no one worries about it.
Transporters are supposed to move the atoms by converting them into energy, moving that energy through subspace, and then converting them back to atoms on the other side, the only energy in the system is the energy that was created when the atoms were converted, so it shouldn’t be possible to create a transporter clone, no matter how many “confinement beams” you have, as where would it’s atoms come from?