Odd behavior with Dynamic innerRadii on EllipsoidGraphics

CesiumJS
1

So, I’m seeing a difference in behavior between using a Cartesian3 for an ellipsoid’s innerRadii, and using a CallbackProperty that always returns the same Cartesian3. Sandcastle code:

viewer.entities.add({
  name: 'Wedge',
  position: new Cesium.Cartesian3(0, 0, 0),
  ellipsoid: {
    radii: new Cesium.Cartesian3(77950137, 77950137, 77950137),
    innerRadii: new Cesium.Cartesian3(24271137, 24271137, 24271137),
    minimumClock: Cesium.Math.toRadians(50),
    maximumClock: Cesium.Math.toRadians(60),
    minimumCone: 0.2617993877991494,
    maximumCone: 2.8797932657906435,
    material: Cesium.Color.RED.withAlpha(0.2)
  }
});

viewer.entities.add({
  name: 'CB Wedge',
  position: new Cesium.Cartesian3(0, 0, 0),
  ellipsoid: {
    radii: new Cesium.CallbackProperty( () => new Cesium.Cartesian3(77950137, 77950137, 77950137), false),
    innerRadii: new Cesium.CallbackProperty(() => new Cesium.Cartesian3(24271137, 24271137, 24271137), false),
    minimumClock: Cesium.Math.toRadians(60),
    maximumClock: Cesium.Math.toRadians(80),
    minimumCone: 0.2617993877991494,
    maximumCone: 2.8797932657906435,
    material: Cesium.Color.GREEN.withAlpha(0.2)
  }
});

yields the following on the globe:
image

Note the difference in the inner curves - I’d expected those to be the same. What am I doing wrong?

Thanks!