Just finished a challenge that involved getting a kill with a skewer and after the match it showed I didn’t complete it.
Also, I think the challenge system for fracture events would work better if you were only able to do those event related challenges first before getting the normal ones. Tonight I had to complete a normal challenge to get a fracture challenge to be available. Ended up overachieving and completed two but only one fracture event challenge was made available even though I still have two left.