Intermittent disconnects from internet Orbi 750

Not sure if I made a mistake in the posting, but this is the cable modem version - Orbi CBR750.

At one point earlier this week, I noticed the UpStream light was flashing white, but that has since not reappeared since I did the hard factory reset. 

I'm having the problem with and without the LAN connected, so I don't believe the cable is the issue - tbh, the cable wasn't connected beforehand, but I did the connection just to see if the issue was WiFi specific.

SqFt is around 1200, but two stories.  I've had this set up since July of last year with no issues.  I first noticed the problem Friday of last week.  No additional devices were added to the network, nor am I aware of any anomalies associated with my equipment.

I live in a condo, so plenty of folks / networks around.

Upstairs is both the main unit and one satellite, about 45 feet apart and in LOS, while the second satellite is downstairs and definitely 30 feet away.  

2.4 was set on auto, but I use 5 for all of my primary devices and that was already set on 48.

I did not have any of the services mentioned turned on.

I'm having issues in all areas of the condo, including when connected via ethernet, so I don't believe this is a WiFi specific problem.