Did the strike mission in the sanctum arena multiple times now and it hasn't progressed since. So I assume it's bugged. If not then what does "Kill one boss in the Sanctum Arena" mean? Also defeating both strike missions doesn't yield towards the achievement. Does it mean the story instance or the strike mission? I'm confused.
I'm Hunter, he/him
Character infos: https://is-it-because-im-charr.tumblr.com/charactersgw2