Armala broke and reentering map hard crashed

I was doing an Originator influenced Sunken City map with Maven (and up the stakes).
After killing all the other bosses, Armala got stuck in the corner with 0 hp.
(sounds like the same as https://www.pathofexile.com/forum/view-thread/2705621)

I left the map to see if reentering would fix it, but my game crashed every time I re-entered.

Moment before merc culls:


Moment after merc culls:


Last thing I saw before crashing out first time: