breach frustrating monster

watever the name of the monster is ... Unavoidable death and super frustrating
just a regular white monster in breach channel a purple beam
area lvl 80
i got maxed resist , 64% phys reduction and about 10k life pool
i die from thaat beam in less than a second from that beam !
even areaa lvl 82 boss doesnt do that much dmg
you dont even see it coming since its across the screen