On the mentioned version this mod(or it's required api) seems to make Lycanites Mobs of the Demon Type only take 1 damage from all sources, I've tested removing a bunch of mods and regenerating worlds, removing this mod and generating a new world seems to fix it.
It seems to occur after you have quit out once and then loaded back into the world..... or changed dimensions, one of the two, I didn't really get it. Thought I should report this anyhow.

nvm it occured again after having removed the mod