in minecraft education edition or Minecraft Pocket Edition. when you open behavior packs and load your world and find the mob spawn egg that you added then its egg is invisble and it says item.enityaddonmob.name and they list what addon is it and the mobs name and when you spawn the mob then its invisble and you cant see it and no sounds are appearing and they will only make the player hurt sound when you hit the mob and when this glitch is happing and you spawn a zoglin or a wither or name a vindicator named johnny then it causes those mobs to attack the mob addons that are invisble . so update all versions of minecraft like java, bedrock, education, ps4, xbox one, nintendo switch and pocket edition so that mob addons dont turn invisble anymore.

when you upload a resource pack then spawn a horse, donkey, mule, skeleton horse or zombie horse then they will be in their old model from 2013 instead of their new model from 2017 and the horse,donkey,mule,skeleton horse and zombie horse will move their tales and open their mouth because the resource pack has caused them to switch to the old model instead of the new model. please update all versions like java bedrock eduaction xbox one ps4 nintendo switch and pocket edition and then horse donkey mule skeleton horse and zombie horse will stay in their new model