Who bears responsibility for the actions of agents seems a little complex. Not in this instance, but in general.
Say I use the summon feature on my Tesla and it runs someone over, am I at fault? You could argue it's not my fault, but I'm definitely getting sued. Is Tesla at fault? Probably but again it's not crystal clear, they could argue it's not their fault (misuse of feature, etc), but either way they're also getting sued.
If Tesla is developing a summon feature and then runs someone over during testing, are they at fault? It would be hard to argue otherwise!
Say I use the summon feature on my Tesla and it runs someone over, am I at fault? You could argue it's not my fault, but I'm definitely getting sued. Is Tesla at fault? Probably but again it's not crystal clear, they could argue it's not their fault (misuse of feature, etc), but either way they're also getting sued.
If Tesla is developing a summon feature and then runs someone over during testing, are they at fault? It would be hard to argue otherwise!