I have had Blue Iris for years and never had an issue, I am currently using version 5. Recently I started to have three of my cameras loose signal every three to five minutes. One would go at a time in no particular sequence. I have tried everything and I can't seem to fix it. I have completely uninstalled and reinstalled the entire system, even went as far as resetting the cameras to factory defaults. Still the same three cameras doing that same weird nonsense. All my cams are hardwired and use POE. All the cameras are the same brand. The three that are loosing signal are all on the same switch, so I am thinking that there is an issue there, but I can't for the life on me figure out what.