It sounds more like she was arrested for not following an order given by the police officer to move out of the way of the robot.
Is it a lawful order to command a person who is not committing a crime to move from a public sidewalk she has every right to be on?
The police do not have unlimited power to order us around.
Quote from a lawyer in the article:
> Personal delivery devices must yield to other pedestrians and pedalcyclists in a pedestrian area
Sounds like the robot legally had to yield to her. If so, what lawful basis would the officer have had to make the order?