First and most important, she‘s quite normal!! You‘re just patting yourself on the shoulder for having done such a brilliant job, your dog‘s hanging on your every word and you‘re wondering what the big deal is about training a dog and then WHAM, they hit puberty and everything you‘ve achieved so far seems to have flown out of the window!!
Good news is, they do come out the other end, - eventually!
, but you do need to be consistent and continue with the training. The problem is, once they get used to tearing off and disappearing, the habit does start to set in and its more difficult to get under control again. Once their noses are in action, they go into their own little world and you just become invisible, - they‘re not ignoring you out of defiance -,(ok well they do that sometimes too
), you‘re just no longer on the radar.
I would personally put her back on the long line all of the time, at least for a few weeks. Praise her every time she looks at you or stops and turns to see where you are. Keep up the recall training with praise and special treats but try not to overdo the amount of times you recall her on in one session. When she does come, feed her a series of treats every few seconds so that she‘ll stay with you and not just grab the treat and tear off again. You can do things while she‘s on the long line to keep her focused on you (sit, stay, sniffing games, - anything) just to reinforce that staying with you is actually quite fun as well.
You will get there, its a tough phase but the work you put in now will pay out a thousand fold for the future. Very best of luck!