I lost 3 treasure keys last night (5/19/15). Not sure what time it was. It was late Eastern time. I had 6 keys in my vault. It asked if I wanted to move 3 and I hit the remove from vault button. Then an error window popped up and poof they were gone. At least the other 3 I didn't take are still in my vault, but I have checked and checked and the 3 I moved are no where to be found. PS4