I'm having the same issue. I can't attack bunnies, pigs, moleworms, mactusks, koalefants etc. unless they attack me first. I tried ranged weapons as well, like boomerang - in this case the "boomerang throwing animation" doesn't play properly and nothing happens. I also tried to create a new server and there is no bug there, however, after going back to my main world, the bug is present. Other players in my world seem to be fine, they don't have this bug. It really bothers me as I don't want to abandon this world, the map layout is really lucky. Is there any way to fix this on my own? I've been a big fan of this game for years, but this really hurts the gaming experience.