I just found out that it doesn't work in 2x2 neither. With 2x2 just some of the cameras in liveview back to substream. Its totally random which camara it shows with substream.
Hello I have a 1 day old DS-7616NI-K2/16P with POE. I use the build in switch and connected 6 new Hikvision cameras DS-2CD2155FWD-I 5 MP. I use the 1 + 5 liveview and all works as expected except there is a problem making the whole setup unuseable and I will soon return it to the shop if I can't...