Time by time, I find a mob, that first works properly, howerer, those mobs freeze, becoming invisible and leaving their decoy. The decoy looks same as the mob, however, the sound effect are still at theso mob decoys. For example, im digging and i find a spider. Then the mob freezes , however, it is like it hed the invisibility potion. Those mobs can do actions like walk around, attack and more. But the decoy stays as it was.