I still got that problem, mostly at night time, on rare occasions on day time. https://zombies.nu/community/threads/9592/ for more information. This bullshit problem got me a tempban for combat logging which is just absolutly ridiculous. Reinstalling my OS + completly download both Arma 2 and OA + DayZero mod didnt fix it, i still have it. FIX IT PLEASE.