Hi. I wanted to follow up with you about the C8 hub. I tried doing what you recommended, IE, restoring from a local backup and switching my Zigbee channels to reduce overlap with the WiFi network. I also changed the batteries of my Sonoff motion sensors. All of these things seemed to have helped, and I've not had issues with them dropping off the network in a couple of weeks now. *knocks on wood.
Thank you so much for helping me out. I also appreciate that you took the time to recommend the WiFiman app, which was helpful in identifying said WiFi channels.
Very glad things have settled for you, and remember, if problems recur, it's definitely someone else's fault. 
