Why the panel can't move with animation?

var panel = new BABYLON.GUI.PlanePanel();
panel.margin = 0.2;
manager.addControl(panel);
panel.linkToTransformNode(appbar);
// panel.position = new BABYLON.Vector3(5.5,3,0);
var button1 = new BABYLON.GUI.HolographicButton(“orientation”);
button1.text = “stand”;
button1.name = “btn1”;
button1.onPointerUpObservable.add(function(){
flag = 1;
scene.beginAnimation(skelton,0,90,true,1.0);
});
panel.addControl(button1);

I can’t move it with animation :
BABYLON.Animation.CreateAndStartAnimation(“walk”, panel.mesh, “position.z”, 30, 30, panel.position.z, panel.position.z + 2, 0);

what about a tiny playground to repro the issue?