Any translucent model object will disappear when assigned an animation block with applyafter.

This only happens when the translucent object is told to applyAfter a solid object. Due to the fact they always render on a different pass, this is not possible. However, I can see about caching the rotations during the rendering overhaul to allow for this. As such, I'm marking it as an enhancement, but backburner.

Fixed in V21.0.0.