I’m having some trouble with pole target. When I add a pole target, the armature doesn’t bend the joints toward the main target anymore - instead it just rotates the first bone.
edit:
this was due to the armature being 100% straight. You need to put a small angle in the hierarchy.
There is an IK target there. The problem was because armature was 100% straight. You can easily see this if you go to edit mode and rotate any bone just a little bit, the bone will immediately snap to the IK target when you exit edit.