Voldon's fireball always goes up in the sky. Is this normal?
Even the fireball remains intact.

That's definitely not normal, and I was having issues with its fireball attack in general so I'll look into it.
What difficulty raid was it? And what was your Minecraft difficulty? (Easy, Normal, Hard)

The difficulty level of Minecraft is hard.
(Hardcore X, 어려움 = hard)

No raids were carried out, and after summoning them with subpoena orders,
This is what happened during the attack on the residents.

I've pushed this in 1.7.1 - I've removed the attack for now (it was temporary anyways), and will add a more unique one for the 1.19 version.