Player fees decreased to 4000 satoshis for the current payout (31 December 2017) and got 1 confirmation after 30 minutes.
Mempool estimates was 400 satoshis/byte.
Fee per byte 173.196 sat/B
Still hunting this "bug". Very suspicious problem , the source probably comes directly from the browser , not from the game. The render and connections are stopped (and even a pause of few seconds is made) before changing of page, so, no reason for the browser to freeze.