Well, I just completed a level 8 Delve. Shows as done. Doesn’t show up on the map any longer as bountiful. Didn’t get credit for actually doing it in the Great Vault. Got a green, non-80 item instead of the Champion Track gear I was supposed to get? Lost my key.
Why? It’s already hard enough to actually do this solo on a Rogue, but now you’re going to further sully my experience by not giving the rewards that I’m supposed to get?