[Kristoffer O]

The Eater of the dead is no longer an entity with one body. For several patches now it has had the ability to split itself into neighboring provinces, slowly growing and turning every province into a field of animated flesh. Each manifestation of the otherworldly eater of the dead has a singular body, but the entity can manifest in several places.

The perceived bug might be a bug, but might also be a side effect of the multi-bodied entity mechanic.