Daily Quest Boss [Lv.50] [Co-op] Defeat Bheg

Bug Name:

Daily Quest Boss [Lv.50] [Co-op] Defeat Bheg​

Bug Description:

I don't know how did it bif but I'll report every even before the bug happen
- I Summom the Boss
- at around his 50% HP he use his ultimate the raging one that his body turn red then furiously attack
- I caught in his attack then die
- I come back fighting him until he has 20% HP and then he use his ulti again but this time he doesn't stop, he keep attack until I die
- while I was died in the choose where to revive window aka Instant resurrection / Closed Town / Closed Node, I see half of his body submerge under the land
- I revive then come back he is already under th terrain and I don't know what should I do... OTL

and this is the screenshot I have when he is under the terrain, you can see that there is Boss's Icon in the Minimap
https://imgur.com/a/ekhez​

How to reproduce/proof:

I don't know how to fix this one so I can say only good luck and sorry for couldn't help > <​

 

Need cancel quest and take again, its not quest related, we already have report about boss ai need rework, ty