P: Animated materials not working

In CC 2018, it was possible to animate a material on a 3D object. I am unable to do so on 20.0.4.

The test setup is really straightforward:
1) Create a new, blank 1000 px square document
2) Create a new 3D mesh preset from layer, and make a sphere.
3) Create a new video timeline.
4) Double-click on the sphere's material in the Layers panel to open it.
5) Add a layer, and draw a line on the layer.
6) Create a video timeline, and keyframe the position of the "line" layer.
7) Move the play head to another position and move the "line " layer to create a short animation. 
😎 Save and close the material.

On CC 2018, I could scrub the video timeline and watch the line move on the surface of the sphere.

On CC 2019, when I scrub the timeline, the animation in the material does not play. Exporting the rendered video also does not include the material animation.

This constitutes a major loss of functionality in the 3D area of Photoshop.