Bluetracker
Tracks Blizzard employees across various accounts.
Do not play the Hearthstone in the final Uldum chapter...
... was about to beat the heroic plague of flame and got the Hearthstone from the Reno treasure hero power. Played it because I thought "why not" and it just returned me to the chapter menu and had to restart🤣
Dave Kosak
This is definitely a bug (The Hearthstone shouldn't be offered here!) - we're hoping to get a fix in soon. Sorry that happened to you!
Although, thematically, it seems like a pretty funny thing for Reno to do.