"Kill X dargyn pilots before hitting the ground while sliding" is broken

[NezuHimeSama]

It tracks progress, even between missions, but it either breaks after the first pilot, or both must be killed in a single slide.

I got one easily, but after killing a few dozen more pilots before hitting the ground, verifying that at least one of those was a regular tusk dargyn, that the pilot wasn't killed in the explosion, and was killed well before hitting the ground, the progress on this riven hasn't updated even once. It doesn't even appear to reset/start the counter over, but rather, every subsequent dargyn doesn't count for anything to this riven.

[NezuHimeSama]

I got two in one airslide just now and it still didn't unlock.

And another double kill worked.

Edited October 20, 2018 by NezuHimeSama

[Sdric]

It's not counting any Dargyn kills at all for me. (Also while sliding) I've done the quest in the past. I've tried it on Kuva Assault pilots and on plains pilots. I've done it without any skills and against enemies suspended by rhino stomp. I really feel like it's bugged. I've been at it for 3 hours and not a single slide kill counted. 

Edited October 20, 2018 by Sdric