Well, it's the same idea; that your horse feels less pressure close to you than out away from you. So, when you turned away , the pressure was gone and she felt a release from any driving she was feeling from you. She would naturally want to hook onto the leader who can mover her feet, especially if the leader stops sending her away and is calm.
Next time she does that, give her a minute of calm, a short pet and then walk off and let her follow a bit. Then turn toward her, stop her and break the connection between you by stopping her and backing away a step or two, kind of off to teh side (don't let her follow) then you can send her off again. You might only send her 10 feet , then see if you can draw her back.
Sounds like you are building a nice connection with her.