[Worldboss] damaged while spawning error?

Hello dear GamezBD community, I hope you are all doing well or at least as well as can be expected

I am surprised at this not being reported at all but it seems that Kzarka/Dim Tree is attackable while spawning, since the update everytime I change Characters for Kzarka/Dim Tree I arrive to an almost empty room and not even a Kzarka/Dim Tree corpse. Before the update (or patch) Kzarka/Dim Tree spawned slow enough, and without taking damage while spawning, for my Character to arrive and join in, sure sometimes Kzarka was already halfway dead but I did have time to get to attack and be part of the event.

So my question is simply whether anyone has noticed if Kzarka/Dim Tree can take damage while spawning or if there is some other reason for the event to end so quickly?