Fetid Pool - Monsters 'stuck' in Crimson Iron node, blocking completion - Bug 1,908,286,337

Used bug command in game to report this, and it said to post here. I am playing HC SSF, not Gauntlet, and in the Fetid Pool every time I try to clear monster get 'stuck' in the Crimson Iron node in the back-right (from the entrance) of the pool. These monsters just sit there, attached to the node, and do not move and cannot be attacked. And because they cannot be attacked, the pool cannot be cleared and the mission cannot be completed.