I had a small whippet cross that did exactly the same at the same age, she would be great until we got 100 yards to the gate out of the field to be put on a lead then she would do the same.
If i walked after her she backed off further, it was nothing to do with Bonding in my case just a dog being a naughty pup, as soon as she saw someone else she would bound up to them and have her lead put on, i used to sit at that gate and have to get my missus to appear then she would run up to her and no probs.
Had nothing to do with bonding, being shouted at or smacked at all, at about 10 months old