Flyers...my 2cents...
I have had chip-yips for 2 years, until this August. They are gone, completely. What I have done hopefully will work for you, but I am not sure because the root problem may be different. Anyway, here is what I have done...
I no longer address the ball with the face square...I have my hands forward and allow the face to 'open up' so that the clubshaft, left arm and clubface are all in one line. So, at address, it looks to me as if my chip will go out to the right, but it doesn't, because of my very small pivot motion. At separation, the clubface is square. It was with this discovery, completely by accident, BTW, that I realized the root of my problem was that I was afraid I would not get the ball in the air from a standard address position, ergo, I needed to help it, causing me to over accel. and flip. Seeing an open clubface, I no longer had that concern, and immediately began hitting wonderful chips and pitches. The fear of missing greens is gone. I can chip or pitch with the best of them, again! Hope this helps...-Dave