"It's not an error." It's part of their core programming, something directly tied into their personal consciousness data. "I'd suggest you put that thought of fixing it away. He wouldn't enjoy you messing around in his head." Or with his programming, for that matter.

2B adjusts her steps to help Peridot keep in time with her own steps. "I don't think it would be impossible to befriend him, even if he dislikes you." He had made nice with the machines in Pascal's village, after all. He'd even gone out of his way to help the son machine who kept locking himself up, and even explained things about how the world worked to the little sister machine.