At first, I noticed my game minimizing a lot and i thought it was random- I use two monitors and i noticed that while viewing my inventory, my mouse will be able to move around and click on desktop items on my second monitor; causing my game to minimize.
Other times my game acts like it minimized, but i still have audio and can not maximize the game or alt/tab etc. The only way i have found to resolve this is to use task manager to force quit DayZ.
occasionally game will crash similar with "DayZ has stopped working."