The Undead Brutes in The Cowards Trial fullcleared not fullfilled

the map was fully cleared and the prophecy was not fullfilled and the prophecymobs did not even spawn.

Seconded. Happening still in Standard. It shows 0 monsters remain in map.

This has been an ongoing issue with a lot of Prophecies, specifically having the Prophecy proc in an area where the necessary mobs either cannot, or do not spawn (Plague of Rats procc'ing in Aspirant's Trial in Lab for instance, but not actually creating any mobs). I'm sure that this will be addressed. Hopefully they just make it so that these kind of Prophecies cannot proc in Unique maps (like they already have addressed the cheesing of Hallowed Ground XP buff with prophecies).