Whisper of Taken 1-3 quest step 2/4 not progressing;

[Lil C]-[ew C]-[ew is ☂д☂]

Done twice in a row, wiped all Taken blights even the final piece and still didn't progress. And yes I was running on a fireteam on legend difficult.

[wotbop]

What room were you in?
1 = spawn room
2 = open area (before vault of glass portal)
3 = before boss room
3 blights per room and can only be destroyed by whisper exotic

[Lil C]-[ew C]-[ew is ☂д☂]

I have not equipped Whisper of the worm exotic in the active weapon slot. It was among other extra weapons. These blights must be destroyed using the sniper rifle?

[illuser]

The blights have to be destroyed using Whisper.

[Absinth Minded]

The "blights" aren't the wells that have a visible barrier. The blights you need to shoot with the Whisper are 3 little, dark balls floating in the air. They do not look like the other blights in the mission where you need to shoot the core a bunch of times.