Artifact challenge 6.8 "equip 4 champions with three 3* or higher artifact sets of lvl 8 or higher" I think i have a bug on this challenge, i have equip  5 champions now with full sets 3* or higher and leveled artifacts to lvl 8 and still it says 0/4 in my challenges. I also just paid to remove a set of armor from another champion so i could equip a set that was already ranked up, but still says 0/4 in challenges. i am stuck please help. thanks.