The bone controlled by IK will only have it’s position set by the ik. When you set the position it will change rotations up the arm. You can control the rotation separately. When I make a control to control the ik I both set up the ik node to control the position of the hand and add a set rotation node connecting the control to the hand as well so that one control and control the arm through ik, and the wrist through rotation. If you want to the rotation of the wrist to control the rotation of the shoulder and angle of the elbow, you will use a pole vector, you could parent the pole vector to the hand controller as well