My arrow is essentially in the same position as yours, I anchor with my middle finger just back of the corner of my mouth, my index finger is under an against my cheek bone, my bent thumb drags on my face until the knuckle drops behind my jaw bone and my ring finger is on the high side of my jaw bone. one minor one, the string with my longbow always touches my chest. One thing that could change the conditioning is to try split finger and go for a completely different feel and tell yourself to anchor deep and hard and keep the hand somewhere on your face until the arrow stops wiggling in the target. The shot is over when the follow through is over.
I cured my target panic by taking advice from a retired PAA a pro, he said that it worked for him and he learned it from someone that came from many years before him. After years of struggle, with occasional minor recurrences now and then, I can control it and the cure took me 30 minutes. I have gone through this with a number of others, in a calm and noncompetitive environment and so far it has worked for all them. The trick is to just do it and carry through with it, and also reassure your improvement by a daily ritual for a period. I know some have tried it, did not believe it was for them or tried to short cut the simple procedure and have gone back to their old ways of clearing up the problem. But what you need to do is rewire your brain by changing how your neurons fire or something like that. It could be also that my smooth and booming operatic baritone-tenor voice mesmerizes my friends into complying, but it has worked every time that I went through it with them. To avoid naysayers and those that would like to ridicule it I will explain it in a PM if you want to try it.