blizz put out a blue post saying that they rolls were bugged for alot of people and they were getting dups of items in m+ but if people saved their tokens from the vaults they could buy more cores and people went crazy in m+ i had a buddy get his myth gaze, and 2 myth pieces from m+ and still get refunded because he was conviced they would refund people and sure enough they did if i can track it down the post i will edit it in.
edit: i can only find the post saying it’s fixed but yeah as long as you didn’t just do the same m+ over and over you would still get diff items which he did which is how got the diff items to cata to teir.