the whole thing has really got me. he has tried both glove and tab , same results. I shot bare bow for a long time and recurve. I don't have the problem because when I get to full draw, ( I hold my draw for 3 to 5 seconds ) I roll my hand and fingers down. I have only ONE finger on the string when I release it. That is the third finger, then I come back and touch my shoulder blade with my hand. Very clean release. This makes it hard for me to understand why he is having the problem.

Ps get and use a finger sling. Never, NEVER grab your bow let it go over by itself.