bugs found when making mods

1-
if you mob the cow model and export it to the game, when you punch the cow, the game will crash.

2-
the mobs or custom entities have a bug to save what they're going to attack, every time you have to keep selecting again and also when you're going to select it gives an error saying you don't have this entity and you have to restart the mcreator.

3-
the game is crashing when you select the option to explode when mob is attacked