Ellipsoid texture not working on moving entity

Hi all,

I’d like to have an ellipsoid with a texture applied to it. It seems the texture is properly applied on a static object whose position does not change over time, while I cannot make it work on a moving object.

ellipsoid_anim

here is a sandcastle example demonstrating my problem
sandcastle

In the case of the object moving I’m initializing the list of positions of the object over time with a SampledPositionProperty, that allows a smooth entity animation.
Am I doing something wrong or is this a bug in Cesium?

I’m using latest Cesium version (1.97)
OS: Windows 10
Browser: Chrome, Firefox

Thanks in advance for your help