I've noticed that over the last several weeks, Petra's Weekly Challenge (complete 2 weekly bounties) has been broken. If you complete her weekly bounty War for the Dreaming City (complete 8 daily bounties) first but not complete her other weekly bounty Ascendant Challenge within the same day, then her count for Petra's Weekly Challenge will reset to 0/2 from 1/2. This makes it so that it is impossible to complete Petra's Weekly Challenge and get the reward if you do her weekly bounties out of order. I will see that Petra's Weekly Challenge will go up to 1/2 after completing War for the Dreaming City, but when I log in the next day, it will have reset to 0/2. I've seen this happen over the last several weeks, on all my characters. I wanted to make sure that I was not imagining it and made sure to double check over several weeks.