How to paste jpg/png images onto terrain

[EspoirBao]

I want to use image maps on the terrain, but when the terrain height exceeds 300, obvious faults occur. How can I adjust the parameters so that the map can be displayed normally?
code：

  let hgrectangle = viewer.scene.primitives.add(
    new Cesium.GroundPrimitive({
      geometryInstances: new Cesium.GeometryInstance({
        geometry: new Cesium.RectangleGeometry({
          rectangle: Cesium.Rectangle.fromDegrees(114.40045120946228, 29.7106500408296, 116.13633030118498, 31.60611919451606),
          vertexFormat: Cesium.EllipsoidSurfaceAppearance.VERTEX_FORMAT,
        }),
      }),
      appearance: new Cesium.EllipsoidSurfaceAppearance({
        aboveGround: false,
      }),
    })
  );

  applyImageMaterial(hgrectangle, "http://192.168.124.33:8889/img/hg.png");

  function applyImageMaterial(primitive, url) {
    primitive.appearance.material = new Cesium.Material({
      fabric: {
        type: "Image",
        uniforms: {
          image: url,
        },
      },
    });
  }