yellow Harvest boss Janaar vanish,immortal and infinitly spawn enemys

got janaar in my harvest and started fighing it.

it did it's inviseble jump attack and then started spawning adds whithout completing her jump attack.

it now keeps on spawning her adds and it's just not there.
i cant damage her aswell
i did reenter the map and restart the game.
my herald of agony seems to targeting the boss evne when other enemys are nearby

https://i.imgur.com/m9Fq2DC.jpg