Act 4 Malachi Boss Fight

After the boss reach i think 30% of the health he entered in his shield mode, and the women has been corrupted normally, but the women reached 0% health all the time and didnt died, i stayed trying to kill or the women or the malachi, and nothing hapenned! So i used my portal to go to city, and backed, and then the boss died instantly, and i followed him normally.

Dont know how to show the screenshot... but my number is "3 261 127 221"