She may have a totally different idea what "Here" means than you. If you always call "Here!" when she walks away she has learned that that command means walking away. Go back to recall 101 and find another command for this behavior to make a fresh start.
Deja, GSD, sable WL, female, born 11 / 2013
Cam, Rough Collie, sable, male, born 8/2015