Ah, killing Lorgal for the Genoharadan quest. I forgot all about that.
The UTP is set to animation state 3, which I gather is "dead" (placeables and creatures both use the same die and dead anim names).
I don't remember what happened (I'll deny any involvement) but at some point there's a corpse inside the Republic base on Manaan.
The Rodian model in this mod gets a new filename, but a simple change in placeables.2da fixes things for the sitting ones and with that the corpse (which uses the sitting placeable).