[SVL]

I need some advice for a form problem (?) one of our junior archers (16) has.
Basically when he shoots he kicks up his bow arm bending it at the elbow.

Now during the indoor season the string hand was droping right down to under his armpit. We worked on that and he has improved a bit. The drop is not so pronounced now, but still needs work.

I am sure both problems are related and I have been trying to work on good shooting form with him. Focusing on correct body alignment and using the right muscles. Also trying to get him to let the bow react in his hand rather than him making the bow react. When I am with him you can see the improvement but once left on his own his form goes back to ???????

I sometimes wonder if he just forgets what he is working on and I don't want him to get stressed out over this as he has exams this year.

Could anybody give me some advice. Maybe I am missing something?
Have you ever had something similar and what solutions did you find.

I will see if I can get permission for some video footage. But it could be a while.