Locked Newcomer Challenges

The Breacher and Trapper newcomer challenges are listed as locked, without any indication of how to unlock them. I’ve played a couple rounds as Buck, Lesion and Ela, thinking that might be relevant, but no dice. Unless it’s aware that I’m a veteran player who just wants free renown and packs to feed my gambling addiction, I don’t know what’s up with them.

EDIT: They’re unlocked now. Neat.