My I version NVR is rebooting (abnormal shutdown in log) at random times. Every few days it seems. I have read that it could be hik-connect enabled? I could turn this off but then I would not get the notifications for line crossing. I thought this latest firmware 4.21.005 would fix it but it...
Latest firmware is this one I believe
http://www.hikvisioneurope.com/portal/?dir=portal/Technical%20Materials/00%20%20Network%20Camera/00%20%20Product%20Firmware/R3%20platform%20%284x26FWD%2C6026FHWD%2CiDS-6XXX%29/V5.4.83_Build180817%28Released%29