Update: A buddy of mine had the BIS neck, then it switched to cache. He just ran all five and it gave him a different item, unfortunately something he already had.
Has anyone seen the bug where the Time Walking weekly showed an actual piece of gear, but then after logging it shows the cache again? Has anyone ran the 5 dungeons to see if the gear matched up?
didn’t run the 5, but I will probably later tonight, mine showed another Mandate for my DH, so if it gets that… I will know for sure
So I saw the item on both my toons, but when I logged out and back in, it changed back to a cache. Did this happen to your toons you haven’t completed it on?
Yes. And I saw what the item was. When I finish the 5 later tonight it will be interesting to see if the same gear is in the box.
If it is, that means the loot is predetermined before you even accept the quest. I think the curtain slipped for a few hours here for Blizzard!
Something sorta related - I’ve done 5 (for the past 3~4 weeks) and the vault showed 2 items (more than 4 heroic). This week, it only shows 1 item. Not that I take the vault gear since it’s less than equipped but was just curious. Bug?
it was a bug
It was an improvement.
It was very cool. I understand why it changed though.
(Oh yep the article says as much!)
You could game the item and obviously re-log/change loot spec. Oversight but I wouldn’t have minded it staying. 
Anything that is too beneficial to players and removes devs’ intentional roadblocks is a bug that will be fixed.
Havent seen anything like that
TW dungeons don’t always count for the vault if you don’t kill every boss. For it to count for the weekly quest you just need to kill the last boss but for the vault you usually need to kill all the listed bosses, depending on the dungeon.