On Mac, since new Update today (24.October) I get "aiting for sevrer" message during the game and then few secons later I'm on the game home screen and on my tier, I see it's counted as a loss. I had several issues with server ons mac and I always had at least the time to rejoin, but now it just like straight up concedes, it seems. And another issue i have is, that the before the patch, when I did rejoin, I couldn't use the sideboard options properly. I could add cards, from the board, where i already had some in the main, but no cards, that are only in the board.