I found (through Garmin phone support) that sensor dropouts were a frequent problem, and a week ago I was told to install some public beta software. I did so and did not see any benefit, UNTIL I also did a hard reset of my device. I did my first ride today since the reset, and NEITHER of the problematic Sensors (Garmin Varia rear-light radar nor Dura-Ace Di2 Sensors on my 2022 Specialized S-Works Roubaix) behaved a bit better, UNTIL after the hard reset, but today I took a "shakedown 17 mile ride and NEITHER disconnected. I'll do a long ride tomorrow to see if the improvement is reproducible, but it looks as though there may be some life left in this old 1030 (it does have the delimitation screen issue that produces vertical colored lines at both screen edges, but that's always been a cosmetic issue that hasn't otherwise affected the unit's performance.
One other issue for me is navigating the forums. I cannot find my previous posts!