Isso é explicado pelo criador do programa aqui . Os scanners não são confiáveis.
Q: Ah, okay. Readers might also wonder why the neck-scanner didn’t register Dolores/Charlotte as a host. I’m assuming that was Ford’s tinkering?
A: Yeah, absolutely that’s in a place where the systems are all code, all the tools they have give them a sense of false confidence. Anything is possible with Ford at the helm.