The app quite often lags when starting a new game, possibly only when connected to internet.
The behavior: I start new game (tap the difficulty), the app gets stuck on main screen with the tapped button stuck orange, and then the game starts - but the timer was on the whole time, so according to the timer I first see the puzzle at about 9 secs in the game already. Tha lag wouldn't bother me much if the timer started at the moment I actually can start solving the puzzle