When i summon entities fireball or small_fireball or Dragon_fireball or Wither_Skull with this command: /summon minecraft:entityname ^ ^ ^3 {direction:[0.0,0.0,0.0],power:[0.0,0.0,0.0],ExplosionPower:2} then these projectiles seem broken. they seem to move when summoning an explosion next to tchem (like normal) and they respond to being shot with an arrow. but a player cannot hit the fireball, and it doesnt seem to render properly (it shows itself for a few moments then disapears) when i change the direction or power values it moves normally but doesnt render to me, and no matter what explosion power i set, they explode at what might be explosion power 1 (explosion of a ghast or even lower) 

in attachment i will show entity data of a dragon_fireball using this command:

/data get entity @e[type=minecraft:dragon_fireball,limit=1]