Source: https://us.battle.net/forums/en/wow/...page=3#post-57I've just been informed that, due to the transition between Patch 7.1.5 and Patch 7.2, there will be no AP rewards in the Challenger's Bounty until next week. Feel free to loot your weekly chest immediately, rather than waiting until after you've upgraded your Artifact.
Don't need to wait to open chest on Tuesday.