Recently I’ve tried completing 3 separate challenges and not had them complete.
Unfriendly fire - Attempted this in weaves, had the warpfire thrower kill more than 10 enemies and the challenge did not complete. No challenge broadcast and it was not completed in the book after completing the weave.
Unsteady aim - Had an Ungor archer kill a Minotaur in weave 7. No challenge broadcast and it was not completed in the book after completing the weave.
Evacuation bell (legend) - I started the timer when jumping down to the bell area. Destroyed the bell and got to the portal within 85 seconds. No broadcast message and the challenge was not completed in the book after the mission.
I’ve completed other challenges this patch, so it does not appear that all challenges are bugged, only these three.
Examples of challenges I’ve completed this patch: Unsafe work environment, Thar she blows