Decided to spend some pizza on 5 magnificent chests and 1 epic, done in the multiplayer chest shop. Single player party was in the middle of a dungeon (between fights). Looted them quickly before I made dinner, made note that I got a legendary out of the epic chest. I don't recall what it was. Came back after dinner to review what I'd gotten and the loot from the epic did not appear to be present, while the loot from the magnificent chests did show up. Occurred around 6:15 EST.
Your items are sitting in the chest waiting for you to click "Take All and Reset". They'll wait forever if necessary (I had some sit in a chest for over a week once).
Nope. Bought the epic chest first, then the 5 magnificents, so I had to hit the take all and reset button before buying them. Nothing when I log back on as well.