If you are going to use reins to ride this horse, then use them meaningfully. I mean, if you can ride her with a neck rope, or mearly by seat aids, more power to you! Howver, if you add reins to the equation, then be sure that they are very meaningful.
So, by bumping the reins, it is harder for the horse to know exactly what they did to achieve a release, and it is important that the horse can earn itself a release for it to be involved in the learning process. When you aske the horse to bend around to you knee, but releaseed the rein while she was still leaning on it, you taught her to lean on the rein, becasue that is what earned her a reward. If you want her to "come OFF the rein", then you might ask her to bring her head around, maybe not so severely to the knee, and gently hold the rein, no bumping, and wait for her to stop pulling back. It might take minutes. She might spin, she might move her head up, she might freeze. You just wait and let her figure it out. But you keep sharp, because one minute she 'll move her head a bit closer to you, putting the tiniest bit of slack in the rein! She just GAVE to the rein! THAT is what you reward with a big, total rein release and a praise and let her walk forward.
You make the rein meaningful when you remember what you are asking for and don't reward the wrong thing, but do reward the very smallest thing that is Correct! Also, don't "ride the brakes" ,. Don't let the horse run through the rein. That is meeting her pull with an equal pull and you will only have a stalemate that builds dullness. You either meet her plus one ounce more, and wait for her to give , right? Or you utilize other techniques , such as circling and such to get the horse to give to the rein. Just don't hang out in the place where you meet each other's pull and the rein is negated and you are both grumpy about it.