I found a fix for the bug on iOS that just removes all sounds from the game, and it would be selfish if I wouldn't share it :-).
You just need to open the game, then open some other app (try typing something in Notes, visiting a website, or open Facebook and refresh for new posts) without "killing" the game, and then get back to it. Then the sounds work just fine!
Unfortunately, there is also he bug where the keyboard won't show up when trying to log in or anything. I'm not aware of a fix for that problem, but I will share it as fast as I know it.