The problem about depth performance between label and billboard

CesiumJS
2

From docs

Eye coordinates is a left-handed coordinate system, where x points towards the viewer’s right, y points up, and z points into the screen

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

  var image = new Image();
  image.onload = function () {
    let bil_label_entity = 
    viewer.entities.add({
      position: Cesium.Cartesian3.fromDegrees(-75.1641667, 39.9522222),
      id: "7539",
      billboard: {
        image: image,
        scale: 100,
        color:Cesium.Color.fromBytes(0,0,0,150),
        sizeInMeters: true,
      },
      label: {
        text: "Label on top of scaling billboard",
        font: "20px sans-serif",
        eyeOffset : new Cesium.Cartesian3(0, 10000, 0),
      },
    });
    viewer.flyTo(viewer.entities.getById("7539"))
  };
  image.src = "../images/facility.gif";