I forgot to mention that several times I have seen a yellow pop-up warning on my AFS screens that says "No ADSB Pos"
The warning has only stayed on for about 10 seconds and then disappears on its own and does not repeat that flight. This has happened about 5 times in the last 6 months. It is usually shortly after takeoff or even while I am still on the ground.
Maybe that is helpful diagnostically?
Tim