Cesium.CallbackProperty height problem when is constant is false

Hi.

I am currently working on creating layering system , and when I got to Polyline , Polygon , Rectangle , I was getting in the same issue.
Heights - my goal is an line with one Billboard of circle in the start and one at the end. - this method is use to replace point entity for layering control .
now when I use Callback Property on each one of them and pass the position with height its height is getting ignored ,
and therefore the Billboard and polyline are in the same level or even polyline is above , but as I pass is constant true or not using the Callback Property
the heights act correctly.

is there any way to resolve it so when the value of is Constant is false its value will be changed and will use the height and will depend on it ?
Thanks very much.

Start by reproducing the reported behavior with CallbackProperty configured with constant false on the Polyline, Polygon, Rectangle, and Billboard cases described in the issue. Compare their rendered heights with the same values passed directly or with constant true, then identify why the dynamic-property path ignores height. Done means dynamic values consistently respect height across the affected entities, with a regression test covering the behavior.

Written by the indexing model from the issue text.