It was some time ago, but I do remember that around 8 months she started being awkward. She'd come back to my call but as soon as I tried to touch her she would run off laughing, or so it seemed.
I also found that if I was feeling less than in charge of things, feeling a bit under the weather, for instance, she would be particularly disobedient, and would completely disregard all instructions. I remember saying to her when setting off for walks, 'please don't embarrass me today'.
I then had her on a long trailing line for months, probably about 6 to 8 months, before I trusted her.
I just kept on with her training and eventually we got through it; nearly reduced me to tears on several occasions though and I am most definitely not a crier.
Once she got through it she seemed to pick up all her training again quite quickly and developed a really reliable recall and stopped ignoring me.
She's nine years old now and has always been an absolute joy, apart from the teenage phase; I can laugh about it now.