There is a problem with setting showBackground to true for label

[PFeiJia]

What happened?

The Label property show defaults to false and showBackground defaults to true. Adding labels with LabelCollection and setting the Label's show to true should display the Label background, but it doesn't

Reproduction steps

const viewer = new Cesium.Viewer("cesiumContainer");

const labels = viewer.scene.primitives.add(new Cesium.LabelCollection());

const label = labels.add({
show:false,
showBackground: true,
position : new Cesium.Cartesian3(1.0, 2.0, 3000000.0),
text : 'label showBackground',
});

setTimeout(()=>{
label.show = true;
},1000);

Sandcastle example

No response

Environment

Browser: Google
CesiumJS Version: 1.122
Operating System:Windows 11