I find that when I build up to the ruby treasure chest or magic hat (by winning 6-7 game in a row first try) that I loose it. Typically, I win a game, and at some point when the coins are tallying up, the game freezes and then stops. When I open Gardenscapes again, I've lost the ruby treasure chest and have to start over. This has happened about 3 times now since the treasure chest has been introduced. I also have to play the game that aborted all over again.