Outdoor Cameras Randomly fail

I have had my outdoor cameras, cam/pan and home security system for about 3-4 months now. Randomly the hub will lose connection with cameras and I usually don’t notice until I go to view and event recording and find nothing recorded since the last time I rebooted…very frustrating. Any ideas? I work pretty much 7 days a week 10-12 hr days so I don’t have lots of time to spend trying to figure this out. I bought this based on reviews and ease of setup. Just need simple. Any help greatly appreciated.