Defeat Blackguard Avenger and Blackguard Tempest - Cannot Complete

Been working on challenges and got the Complete Encounters IV and could do everything but "Defeat Blackguard Avenger and Blackguard Tempest in Promenade Map while all players are affected by Conductivity"

When killing the boss' whether under conductivity or not there is no popup saying I failed or completed the challenge. I have tried 5 times now and killed them multiple times while under Conductivity. Not sure how to complete this challenge if it doesn't seem to register.

I second this, same problem here, no pop-up on the success or failed of the challenge...

Same thing it's happening to me...

still can get it...

Just ran it twice, and same. No pop-up for failed or succeeded. it's bugged and not completing (and I was under conductivity both times).

Same for me. Tried with and without selfcurse multiple times. Nothing worked.

Same here. Ran it multiple times and no pop up whatsoever saying I failed or not

Have you tried killing them while standing in the area of effect Conductivity they place?

yep, selfcurse wont work, you need to stand in the curse ring from the female boss

I had the same issue when I tried to do it in the tier 5 and tier 9 versions of the map. After that I tried a tier 14 (rare) map and it worked, might only work in the tier 14 version of the map, but needs more evidence.