Help with fixing the mod.

A long time ago, a mod was created that replaces the models of the original ents with ents from the beta version of the game. Not long ago, I decided to install this mod, but I encountered a problem: the ancient ents do not leave a corpse behind when they die, while the others work normally. I tried to figure out the problem myself, but for some reason, nothing worked. The death animation itself works: I placed the model of a dying ent with the corresponding animation on a hero, and everything worked perfectly. It just doesn't work on the creature. Can anyone suggest how to fix the problem?