DoubleDown Casino review: slots games megabucks

I attempt to play the megabucks. When I place a bet, the money is withdrawn from my holdings and then the game freezes. Sometimes, if I tap the screen the games will slowly move to complete a spin. However, tapping the screen now has no effect. I restarted the game expecting to see it working and found that the withdrawn money is gone and the game did not work. When I see the progressive jackpot building I assume the game is working and bet again only to have the game freeze and take my money. Last 2 bets were for $1M each. Progressive jackpot is building but slot will not spin. The Auto and Spin/Skip buttons are grayed out. Why does this game suddenly not work? My current account balance is $309, 244, 787. It was $311, 244, 787 before the two bets. As I wrote this the game Sent a "still playing?" message.