Visibility of label in 2d

There is a problem with visibility of label in 2d. The label is below of polygon and polygon covers label and staying above the label but in 3d all is ok. Cesium version is 1.11.0. Here is an example of my code:
    polygon: {
      hierarchy: Cesium.Cartesian3.fromDegreesArray([-73.42,45.11,-72.32,42.17,-76.42,40.04,
        -79.55,43.53,-75.43,45.02,-73.42,45.11 ]),
        material: Cesium.Color.RED.withAlpha(0.5),
  position : Cesium.Cartesian3.fromDegrees(-78.1641667, 41.9522222),
  label : {
        text : 'Philadelphia',
        eyeOffset : new Cesium.Cartesian3(0.0, 0.0, -100000),
3d -
2d -


I would recommend upgrading to the most recent version of Cesium if possible. I ran your code in master and the label appeared over the polygon in 2D.

Let me know if you are still seeing the problem after you upgrade.