RBR850 - no access to interface

*UPDATE*

So I opted to not do the NG Support recommended facotry reset.  Instead, I did the manual FW (v3.2.17.12_1.4.14) update on the satellite and router again (a reflash of the same version of the existing FW).  I had updated to this version of FW during my initial contact with NG Support, but I did it over a wifi connection and I've seen other posts recommending doing it via an ethernet connection to each device. 

For this attempt, I hardwired into the satellite first, update the FW manually, then proceeded to do the same with the router.  Once both were successfully completed, I powered off both devices, waiting a minute or two, and then powered on the router.  Once it came back online, I powered on the satellite.  

At first, the UI and app worked with no issues and I thought I was in the clear.  However, later that evening, probably within 2 or 3 hours of doing the manual update, the same issue appeared again.  I decided to walk away for the evening and didn't do much else until the next day when I tried logging in on the web UI and, amazingly, it worked again.  I had not changed anything with the configuration or had I rebooted the router.  I then tried the app and it worked too.  I've been checking daily, and as of about an hour ago, everything is still functioning without issue. 

I'll continue to monitor this issue, but fingers crossed that the manual, hard-wired FW flash fixed the issue.  I really didn't want to go the route of the factory reset if I could avoid it.