This happens on multiple occasions. I am playing in either a ranked match best of one, or a casual game. After a while into the game, the client freezes up, then I am returned to the main screen. Despite playing for the daily quests, no changes were made to my progress bars (e.g. play 20 black or white spells, so I play an exclusively black and white deck, then after 20 minutes in a game and a crash I am returned to the main menu with 0/20 for the progress). My PC meets all recommendations, and my internet connection is solid. This is beyond frustrating.