When you copy a living human mind, you need to capture all of the quantum states of energy in the physical brain.
Although this will not result in a perfect copy.
A digital copy is not the same as a biochemical copy.
Biochemical energy does not behave the same as electrical energy in a virtual model.
So, a copied mind does not function properly.
We try to erase the self-awareness and the pain systems, adding fake sensory feedback to simulate a live vessel.
But they all collapse in the end, going silent and catatonic in their own private digital hells.