Unless I uninstall the cameras it doesn't seem to make a difference (aka just unplugging them) because they still show in the app. I've tried to attach a few pics of them offline but I can't seem to in the forum tool. The offline is the grey circle with the line and all you have to do is go to the device page and then back out and they no longer show offline in multimode or shortcut. You don't even have to select a camera in devices but just go to that page and all the offline cameras are back. Please let me know if you want me to email the screen shots to you. Also I am happy to test any update you might have, I have TestFlight already installed (I was a IT Architect and now IT instructor so no problem with beta software). Restarting the app does bring the same condition back and the same fix in going into the device setting page fixes it so it's very consistent, also all camera firmware is up to date as well.
Now I also did discover something interesting, if you put all of the cameras in the shortcut menu they all show up online when you start the application. But if you take any out of the shortcut menu those show up offline. I just figured that out while I was typing this.