Poor finesse wedge ball contact

In my experience, the ball sliding up the face usually comes from too much axis tilt and the rib cage staying in flexion too long. This usually creates low point issues and shaft lean/trajectory issues.

The tricky thing with your question is handling feel vs real. In reality, the face closes to the target, and to the path during the finesse wedge. But, many pros who do close it describe the feeling of it staying open/square during the stroke. So knowing that it closes doesn't necessarily fix your issue. If you are prone to too much tilt, then tilting like that can be one of your sources of closing the face and trying to close the face that way may actually cause you to tilt more and have bigger contact issues and more cases of the ball sliding up the face.

With the ball sliding up the face, first thing I'd check is your impact line and body position at impact. If you want more help please post a swing so we can move from theory to a more detailed solution.

Happy Golfing,

Tyler