Black crow invulnerable and character locked / forced suicide

Boss: Black Crow, Map version.

What happens:

During the "locked door" phase, right before the boss has to pick the bell, and go out he becomes invulnerable, you cannot teleport out, you cannot damage him, you are effectively locked.

How it happened:

Very high damage, that brought him quick to 10% immediately when he become attackable.

I fought him like 1-2 minute invulnerable, and after that I had to suicide to unstuck.

Not critical bug, but please fix.

Now when I think about it, maybe the first phase the DPS also took quite a lot from him, it may be that the initial burst messed up the script.

The same issue happened to me just now. How did you get out of the situation? The boss is invulnerable, and minions do not even try to target him.