Lighting weird behaviour on Allembic meshes

I’m getting an extrange lighting effect with the same mesh in a scene. The one on the left is a mesh set as dynamic and the one on the right is an animated allembic. The effect can be seen clearly in the hands and in the reflections on the eyes.
I don’t know where this came from. Anyone has an idea why this is happening?


Some more info. The allembic seems to be a bunch of animated morph targets.