Crashing Game!!!

Hi,
I would like to draw your attention to the problem I have been facing ever since I started playing. I play on my Samsung Galaxy device which has Android ver 4.2 Jelly Bean in it. But whenever I don't tap on the screen for more than a minute and the screen goes black(backlight is gone), the game crashes when I try to do anything else. Many times I lost auctions due to this problem. Does anyone else face the same problem???

Change your screen settings so it doesn't dim? I had problems on my laptop and just changed the screen settings.