Progress mission 71/276 isnt giving me the reward for completing this challenge.  

I have screenshots proving that I have done "equip 2 ATK champions with level 12+ gauntlets, boots, and a chestplate with atk(%) as their primary stats"

https://pasteboard.co/IQhJ6oi.jpg and https://pasteboard.co/IQhJOTg.jpg links to screenshot showing the challenge completed.

I cannot continue to throw silver away upgrading useless artifacts because of this, barely even got into the game and hit a bug which will not allow me to progress.  Haven't even had the game for a week!