Why three.js morph animation works only shadow?

Why three.js morph animation works only shadow?

I have created morph animation from Blender and use bone with IK. But it
doesn't works well. I can see an animation only shadow, not animate a
model.
I have created other model with morph animation, that was working well. I
didn't change the settings of three.js exporter.
Here is sample:
http://works.edo-m18.me/three.js/demos/03/json-ver/
This is working animation only shadow, why?