Arcana Entrati Device bounty stage having severe issues

[Redpaws]

Due to a bug, getting the bonus on this mission is nearly impossible.

Charge the Entrati device.
Grab the experimental fluid sac.
Toss it at enemies to mark them.
Kill marked enemies.

The highlighted portion works extremely poorly right now, where I'm able to only mark 0-2 enemies at a time most attempts. It doesn't matter how clustered up they are. I've tried just walking around in circles to get them to group up, I've tried using Ensnare to group them up. I've tried tossing the sac directly at the enemy, I've tried tossing it at the ground right next to them. On average, I have to use 8-10 sacs on average to finish this bounty. This wasn't the case at the launch of Arcana. I suspect something was changed so it now requires line of sight from the explosion to mark enemies, in which case, the simple solution is to revert that. Let it hit through enemies and terrain like most explosions already do.