For awhile now I've been using a two point anchor.....index finger under cheekbone, and thumb knuckle behind the earlobe. About every 5th shot I get a pluck....bad. Arrow impacts 6-18" right (am RH). Been trying to solve this once and for all for the last week.
When I grip the string my thumb is curled so that the thumbnail is perpendicular to the ground and the knuckle lays comfortably behind my earlobe. I finally realized this puts my thumb in a "spring loaded" position. As my hand opens at release my thumb is flinging wide open as well, pushing my hand away from my face before, or at the same time as, my string fingers open and release the string. The result is that dreaded wide to the right shot.
Being dense, it only took me a few weeks to realize that when I reach full draw, if I'll just extend my thumb somewhat parallel to the ground inside my hand the pluck is minimized. I'm working on readjusting my comfort level at anchor this way, and not sure it's going to get there.
Any coaching suggestions on release drills/tips are definitely welcome here.