Moving Ellipse entity in viewer.scene.preUpdate.addEventListener

Hello

I’ve created an entity having an ellipse property.

I am trying to update its position in viewer.scene.preUpdate.addEventListener
impossible to make it working. The viewer become frozen even when playing in realtime mode

Any possible workaround or could it be a bug? not only ellispe not working, same behavior when using a cylinder or other graphical shape

The idea will to have a circle on earth surface moving over time along a precomputed trajectory

thanks for helping

Bruno