Doryani stuck in phase 1

This happens with both versions of Doryani (Act 3 boss and Stone Citadel boss). When you damage him to 50% hp he becomes invulnerable and starts a phase transition animation (activates his mega robot).

However, almost every time he performs a few more attack animations before the phase transition. While invulnerable. This is bad and needs to be fixed.

Sometimes it gets just stupid. Here's an example of him being stuck in phase 1 and refusing to transition to his robot phase for 2.5 MINUTES:

Video from stream

I thought maybe he was just short of the 50% hp mark and tried to damage him during that. He took no damage whatsoever. His hp was definitely locked.

This is ridiculous. Fix please.

Similar problem here, I died to a Doryani attack after he had already died, respawned and had to do Doryani fight again. Now stuck in transition between phase 1 and 2, hasn't changed to phase 2 after 10 mins or so. pls fix GGG.