Basically, the issue is that when a s3o unit is cloaked, it loses the normal texture and gets the patchwork of little textures usually seen when there is no skin.
Uncloaked:

Cloaked:

I tried this with some of Star Wars Spring's s3o units, and got the same result. I'm wondering if its a result of our method somehow, or a real bug.
I'm using build 1947 in these shots.