yes pls fix this fast , a loot of ppl stuck in this boss , gg end game for many y.y

I had some fights with him, it seens that the problem is the aether damage: If you proc statis on him before he tranforms he will stuck forever and you can't damage him.
I don't know if other status effects make him unable to kill but so far toxic, sacred, shadow, thunder, physical and fire have no problems with him.

Sad because all my build is focused on timeweaver.

Can confirm the stasis! Worked for me. Tried all the "don't attack for 2 sec after transformation and couldn't manage to kill him. But without stasis there was no problem at all. Just damaged through and killed him first try.

I had the same issue but I finally made it.

I´ve killed him without using any stasis effects in my skills.

I hope it work for you guys as well.